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</div> <div class="control"> <button class="button is-small is-link">Go</button> </div> </div> </form> </div> </div> <ol class="breathe-horizontal" start="1"> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2305.06633">arXiv:2305.06633</a> <span> [<a href="https://arxiv.org/pdf/2305.06633">pdf</a>, <a href="https://arxiv.org/format/2305.06633">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1007/JHEP10(2023)169">10.1007/JHEP10(2023)169 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of the forward $畏$ meson production rate in p-p collisions at $\sqrt{s}$=13 TeV with the LHCf-Arm2 detector </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Piparo%2C+G">Giuseppe Piparo</a>, <a href="/search/hep-ex?searchtype=author&query=Adriani%2C+O">Oscar Adriani</a>, <a href="/search/hep-ex?searchtype=author&query=Berti%2C+E">Eugenio Berti</a>, <a href="/search/hep-ex?searchtype=author&query=Betti%2C+P">Pietro Betti</a>, <a href="/search/hep-ex?searchtype=author&query=Bonechi%2C+L">Lorenzo Bonechi</a>, <a href="/search/hep-ex?searchtype=author&query=Bongi%2C+M">Massimo Bongi</a>, <a href="/search/hep-ex?searchtype=author&query=D%27Alessandro%2C+R">Raffaello D'Alessandro</a>, <a href="/search/hep-ex?searchtype=author&query=Detti%2C+S">Sebastiano Detti</a>, <a href="/search/hep-ex?searchtype=author&query=Haguenauer%2C+M">Maurice Haguenauer</a>, <a href="/search/hep-ex?searchtype=author&query=Itow%2C+Y">Yoshitaka Itow</a>, <a href="/search/hep-ex?searchtype=author&query=Kasahara%2C+K">Katsuaki Kasahara</a>, <a href="/search/hep-ex?searchtype=author&query=Kitagami%2C+Y">Yuga Kitagami</a>, <a href="/search/hep-ex?searchtype=author&query=Kondo%2C+M">Moe Kondo</a>, <a href="/search/hep-ex?searchtype=author&query=Matsubara%2C+Y">Yutaka Matsubara</a>, <a href="/search/hep-ex?searchtype=author&query=Menjo%2C+H">Hiroaki Menjo</a>, <a href="/search/hep-ex?searchtype=author&query=Muraki%2C+Y">Yasushi Muraki</a>, <a href="/search/hep-ex?searchtype=author&query=Ohashi%2C+K">Ken Ohashi</a>, <a href="/search/hep-ex?searchtype=author&query=Papini%2C+P">Paolo Papini</a>, <a href="/search/hep-ex?searchtype=author&query=Ricciarini%2C+S">Sergio Ricciarini</a>, <a href="/search/hep-ex?searchtype=author&query=Sako%2C+T">Takashi Sako</a>, <a href="/search/hep-ex?searchtype=author&query=Sakurai%2C+N">Nobuyuki Sakurai</a>, <a href="/search/hep-ex?searchtype=author&query=Scaringella%2C+M">Monica Scaringella</a>, <a href="/search/hep-ex?searchtype=author&query=Shimizu%2C+Y">Yuki Shimizu</a>, <a href="/search/hep-ex?searchtype=author&query=Tamura%2C+T">Tadashi Tamura</a>, <a href="/search/hep-ex?searchtype=author&query=Tiberio%2C+A">Alessio Tiberio</a> , et al. (4 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2305.06633v1-abstract-short" style="display: inline;"> The forward $畏$ mesons production has been observed by the Large Hadron Collider forward (LHCf) experiment in proton-proton collision at $\sqrt{s}$=13 TeV. This paper presents the measurement of the inclusive production rate of $畏$ in $p_T<$ 1.1 GeV/c, expressed as a function of the Feynman-x variable. These results are compared with the predictions of several hadronic interaction models commonly… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2305.06633v1-abstract-full').style.display = 'inline'; document.getElementById('2305.06633v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2305.06633v1-abstract-full" style="display: none;"> The forward $畏$ mesons production has been observed by the Large Hadron Collider forward (LHCf) experiment in proton-proton collision at $\sqrt{s}$=13 TeV. This paper presents the measurement of the inclusive production rate of $畏$ in $p_T<$ 1.1 GeV/c, expressed as a function of the Feynman-x variable. These results are compared with the predictions of several hadronic interaction models commonly used for the modelling of the air showers produced by ultra-high energy cosmic rays. This is both the first measurement of $畏$ mesons from LHCf and the first time a particle containing strange quarks has been observed in the forward region for high-energy collisions. These results will provide a powerful constraint on hadronic interaction models for the purpose of improving the understanding of the processes underlying the air showers produced in the Earth's atmosphere by ultra-energetic cosmic rays. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2305.06633v1-abstract-full').style.display = 'none'; document.getElementById('2305.06633v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 11 May, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">18 pages, 7 figures, 4 tables</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> CERN-EP-2023-076 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> J. High Energ. Phys. 2023, 169 (2023) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2208.04133">arXiv:2208.04133</a> <span> [<a href="https://arxiv.org/pdf/2208.04133">pdf</a>, <a href="https://arxiv.org/format/2208.04133">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1748-0221/17/09/P09002">10.1088/1748-0221/17/09/P09002 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Development of the photo-diode subsystem for the HERD calorimeter double-readout </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Adriani%2C+O">O. Adriani</a>, <a href="/search/hep-ex?searchtype=author&query=Antonelli%2C+M">M. Antonelli</a>, <a href="/search/hep-ex?searchtype=author&query=Basti%2C+A">A. Basti</a>, <a href="/search/hep-ex?searchtype=author&query=Berti%2C+E">E. Berti</a>, <a href="/search/hep-ex?searchtype=author&query=Betti%2C+P">P. Betti</a>, <a href="/search/hep-ex?searchtype=author&query=Bigongiari%2C+G">G. Bigongiari</a>, <a href="/search/hep-ex?searchtype=author&query=Bonechi%2C+L">L. Bonechi</a>, <a href="/search/hep-ex?searchtype=author&query=Bongi%2C+M">M. Bongi</a>, <a href="/search/hep-ex?searchtype=author&query=Bonvicini%2C+V">V. Bonvicini</a>, <a href="/search/hep-ex?searchtype=author&query=Bottai%2C+S">S. Bottai</a>, <a href="/search/hep-ex?searchtype=author&query=Brogi%2C+P">P. Brogi</a>, <a href="/search/hep-ex?searchtype=author&query=Castellini%2C+G">G. Castellini</a>, <a href="/search/hep-ex?searchtype=author&query=Checchia%2C+C">C. Checchia</a>, <a href="/search/hep-ex?searchtype=author&query=Casaus%2C+J">J. Casaus</a>, <a href="/search/hep-ex?searchtype=author&query=Cui%2C+X">X. Cui</a>, <a href="/search/hep-ex?searchtype=author&query=Dong%2C+Y">Y. Dong</a>, <a href="/search/hep-ex?searchtype=author&query=D%27Alessandro%2C+R">R. D'Alessandro</a>, <a href="/search/hep-ex?searchtype=author&query=Detti%2C+S">S. Detti</a>, <a href="/search/hep-ex?searchtype=author&query=Giovacchini%2C+F">F. Giovacchini</a>, <a href="/search/hep-ex?searchtype=author&query=Finetti%2C+N">N. Finetti</a>, <a href="/search/hep-ex?searchtype=author&query=Maestro%2C+P">P. Maestro</a>, <a href="/search/hep-ex?searchtype=author&query=Marrocchesi%2C+P+S">P. S. Marrocchesi</a>, <a href="/search/hep-ex?searchtype=author&query=Liu%2C+X">X. Liu</a>, <a href="/search/hep-ex?searchtype=author&query=Marin%2C+J">J. Marin</a>, <a href="/search/hep-ex?searchtype=author&query=Martinez%2C+G">G. Martinez</a> , et al. (18 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2208.04133v1-abstract-short" style="display: inline;"> The measurement of cosmic-ray individual spectra provides unique information regarding the origin and propagation of astro-particles. Due to the limited acceptance of current space experiments, protons and nuclei around the "knee" region ($\sim1\ PeV$) can only be observed by ground based experiments. Thanks to an innovative design, the High Energy cosmic-Radiation Detection (HERD) facility will a… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2208.04133v1-abstract-full').style.display = 'inline'; document.getElementById('2208.04133v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2208.04133v1-abstract-full" style="display: none;"> The measurement of cosmic-ray individual spectra provides unique information regarding the origin and propagation of astro-particles. Due to the limited acceptance of current space experiments, protons and nuclei around the "knee" region ($\sim1\ PeV$) can only be observed by ground based experiments. Thanks to an innovative design, the High Energy cosmic-Radiation Detection (HERD) facility will allow direct observation up to this energy region: the instrument is mainly based on a 3D segmented, isotropic and homogeneous calorimeter which properly measures the energy of particles coming from each direction and it will be made of about 7500 LYSO cubic crystals. The read-out of the scintillation light is done with two independent systems: the first one based on wave-length shifting fibers coupled to Intensified scientific CMOS cameras, the second one is made of two photo-diodes with different active areas connected to a custom front-end electronics. This photo-diode system is designed to achieve a huge dynamic range, larger than $10^7$, while having a small power consumption, few mW per channel. Thanks to a good signal-to-noise ratio, the capability of a proper calibration, by using signals of both non-interacting and showering particles, is also guaranteed. In this paper, the current design and the performance obtained by several tests of the photo-diode read-out system are discussed. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2208.04133v1-abstract-full').style.display = 'none'; document.getElementById('2208.04133v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 8 August, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> JINST 17 P09002 (2022) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2207.06696">arXiv:2207.06696</a> <span> [<a href="https://arxiv.org/pdf/2207.06696">pdf</a>, <a href="https://arxiv.org/format/2207.06696">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Astrophysical Phenomena">astro-ph.HE</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Methods for Astrophysics">astro-ph.IM</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1748-0221/17/08/P08014">10.1088/1748-0221/17/08/P08014 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Light yield non-proportionality of inorganic crystals and its effect on cosmic-ray measurements </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Adriani%2C+O">O. Adriani</a>, <a href="/search/hep-ex?searchtype=author&query=Berti%2C+E">E. Berti</a>, <a href="/search/hep-ex?searchtype=author&query=Betti%2C+P">P. Betti</a>, <a href="/search/hep-ex?searchtype=author&query=Bigongiari%2C+G">G. Bigongiari</a>, <a href="/search/hep-ex?searchtype=author&query=Bonechi%2C+L">L. Bonechi</a>, <a href="/search/hep-ex?searchtype=author&query=Bongi%2C+M">M. Bongi</a>, <a href="/search/hep-ex?searchtype=author&query=Bottai%2C+S">S. Bottai</a>, <a href="/search/hep-ex?searchtype=author&query=Brogi%2C+P">P. Brogi</a>, <a href="/search/hep-ex?searchtype=author&query=Castellini%2C+G">G. Castellini</a>, <a href="/search/hep-ex?searchtype=author&query=Checchia%2C+C">C. Checchia</a>, <a href="/search/hep-ex?searchtype=author&query=Alessandro%2C+R+D">R. D Alessandro</a>, <a href="/search/hep-ex?searchtype=author&query=Detti%2C+S">S. Detti</a>, <a href="/search/hep-ex?searchtype=author&query=Finetti%2C+N">N. Finetti</a>, <a href="/search/hep-ex?searchtype=author&query=Maestro%2C+P">P. Maestro</a>, <a href="/search/hep-ex?searchtype=author&query=Marrocchesi%2C+P+S">P. S. Marrocchesi</a>, <a href="/search/hep-ex?searchtype=author&query=Mori%2C+N">N. Mori</a>, <a href="/search/hep-ex?searchtype=author&query=Olmi%2C+M">M. Olmi</a>, <a href="/search/hep-ex?searchtype=author&query=Pacini%2C+L">L. Pacini</a>, <a href="/search/hep-ex?searchtype=author&query=Papini%2C+P">P. Papini</a>, <a href="/search/hep-ex?searchtype=author&query=Poggiali%2C+C">C. Poggiali</a>, <a href="/search/hep-ex?searchtype=author&query=Ricciarini%2C+S">S. Ricciarini</a>, <a href="/search/hep-ex?searchtype=author&query=Spillantini%2C+P">P. Spillantini</a>, <a href="/search/hep-ex?searchtype=author&query=Starodubtsev%2C+O">O. Starodubtsev</a>, <a href="/search/hep-ex?searchtype=author&query=Stolzi%2C+F">F. Stolzi</a>, <a href="/search/hep-ex?searchtype=author&query=Tiberio%2C+A">A. Tiberio</a> , et al. (1 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2207.06696v1-abstract-short" style="display: inline;"> The multi-TeV energy region of the cosmic-ray spectra has been recently explored by direct detection experiments that used calorimetric techniques to measure the energy of the cosmic particles. Interesting spectral features have been observed in both all-electron and nuclei spectra. However, the interpretation of the results is compromised by the disagreements between the data obtained from the va… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2207.06696v1-abstract-full').style.display = 'inline'; document.getElementById('2207.06696v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2207.06696v1-abstract-full" style="display: none;"> The multi-TeV energy region of the cosmic-ray spectra has been recently explored by direct detection experiments that used calorimetric techniques to measure the energy of the cosmic particles. Interesting spectral features have been observed in both all-electron and nuclei spectra. However, the interpretation of the results is compromised by the disagreements between the data obtained from the various experiments, that are not reconcilable with the quoted experimental uncertainties. Understanding the reason for the discrepancy among the measurements is of fundamental importance in view of the forthcoming high-energy cosmic-ray experiments planned for space, as well as for the correct interpretation of the available results. The purpose of this work is to investigate the possibility that a systematic effect may derive from the non-proportionality of the light response of inorganic crystals, typically used in high-energy calorimetry due to their excellent energy-resolution performance. The main reason for the non-proportionality of the crystals is that scintillation light yield depends on ionisation density. Experimental data obtained with ion beams were used to characterize the light response of various scintillator materials. The obtained luminous efficiencies were used as input of a Monte Carlo simulation to perform a comparative study of the effect of the light-yield non-proportionality on the detection of high-energy electromagnetic and hadronic showers. The result of this study indicates that, if the calorimeter response is calibrated by using the energy deposit of minimum ionizing particles, the measured shower energy might be affected by a significant systematic shift, at the level of few percent, whose sign and magnitude depend specifically on the type of scintillator material used. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2207.06696v1-abstract-full').style.display = 'none'; document.getElementById('2207.06696v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 14 July, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">to be published in JINST</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> JINST 17 P08014 (2022) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2110.01561">arXiv:2110.01561</a> <span> [<a href="https://arxiv.org/pdf/2110.01561">pdf</a>, <a href="https://arxiv.org/format/2110.01561">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Methods for Astrophysics">astro-ph.IM</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1748-0221/16/10/P10024">10.1088/1748-0221/16/10/P10024 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The CaloCube calorimeter for high-energy cosmic-ray measurements in space: performance of a large-scale prototype </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Adriani%2C+O">O. Adriani</a>, <a href="/search/hep-ex?searchtype=author&query=Agnesi%2C+A">A. Agnesi</a>, <a href="/search/hep-ex?searchtype=author&query=Albergo%2C+S">S. Albergo</a>, <a href="/search/hep-ex?searchtype=author&query=Antonelli%2C+M">M. Antonelli</a>, <a href="/search/hep-ex?searchtype=author&query=Auditore%2C+L">L. Auditore</a>, <a href="/search/hep-ex?searchtype=author&query=Basti%2C+A">A. Basti</a>, <a href="/search/hep-ex?searchtype=author&query=Berti%2C+E">E. Berti</a>, <a href="/search/hep-ex?searchtype=author&query=Bigongiari%2C+G">G. Bigongiari</a>, <a href="/search/hep-ex?searchtype=author&query=Bonechi%2C+L">L. Bonechi</a>, <a href="/search/hep-ex?searchtype=author&query=Bongi%2C+M">M. Bongi</a>, <a href="/search/hep-ex?searchtype=author&query=Bonvicini%2C+V">V. Bonvicini</a>, <a href="/search/hep-ex?searchtype=author&query=Bottai%2C+S">S. Bottai</a>, <a href="/search/hep-ex?searchtype=author&query=Brogi%2C+P">P. Brogi</a>, <a href="/search/hep-ex?searchtype=author&query=Castellini%2C+G">G. Castellini</a>, <a href="/search/hep-ex?searchtype=author&query=Cattaneo%2C+P+W">P. W. Cattaneo</a>, <a href="/search/hep-ex?searchtype=author&query=Checchia%2C+C">C. Checchia</a>, <a href="/search/hep-ex?searchtype=author&query=Alessandro%2C+R+D">R. D Alessandro</a>, <a href="/search/hep-ex?searchtype=author&query=Detti%2C+S">S. Detti</a>, <a href="/search/hep-ex?searchtype=author&query=Fasoli%2C+M">M. Fasoli</a>, <a href="/search/hep-ex?searchtype=author&query=Finetti%2C+N">N. Finetti</a>, <a href="/search/hep-ex?searchtype=author&query=Italiano%2C+A">A. Italiano</a>, <a href="/search/hep-ex?searchtype=author&query=Maestro%2C+P">P. Maestro</a>, <a href="/search/hep-ex?searchtype=author&query=Marrocchesi%2C+P+S">P. S. Marrocchesi</a>, <a href="/search/hep-ex?searchtype=author&query=Mori%2C+N">N. Mori</a>, <a href="/search/hep-ex?searchtype=author&query=Orzan%2C+G">G. Orzan</a> , et al. (23 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2110.01561v1-abstract-short" style="display: inline;"> The direct observation of high-energy cosmic rays, up to the PeV energy region, will increasingly rely on highly performing calorimeters, and the physics performance will be primarily determined by their geometrical acceptance and energy resolution. Thus, it is extremely important to optimize their geometrical design, granularity and absorption depth, with respect to the totalmass of the apparatus… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2110.01561v1-abstract-full').style.display = 'inline'; document.getElementById('2110.01561v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2110.01561v1-abstract-full" style="display: none;"> The direct observation of high-energy cosmic rays, up to the PeV energy region, will increasingly rely on highly performing calorimeters, and the physics performance will be primarily determined by their geometrical acceptance and energy resolution. Thus, it is extremely important to optimize their geometrical design, granularity and absorption depth, with respect to the totalmass of the apparatus, which is amongst the most important constraints for a space mission. CaloCube is an homogeneous calorimeter whose basic geometry is cubic and isotropic, obtained by filling the cubic volume with small cubic scintillating crystals. In this way it is possible to detect particles arriving from every direction in space, thus maximizing the acceptance. This design summarizes a three-year R&D activity, aiming to both optimize and study the full-scale performance of the calorimeter, in the perspective of a cosmic-ray space mission, and investigate a viable technical design by means of the construction of several sizable prototypes. A large scale prototype, made of a mesh of 5x5x18 CsI(Tl) crystals, has been constructed and tested on high-energy particle beams at CERN SPS accelerator. In this paper we describe the CaloCube design and present the results relative to the response of the large scale prototype to electrons. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2110.01561v1-abstract-full').style.display = 'none'; document.getElementById('2110.01561v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 4 October, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">24 pages, 19 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2003.02192">arXiv:2003.02192</a> <span> [<a href="https://arxiv.org/pdf/2003.02192">pdf</a>, <a href="https://arxiv.org/ps/2003.02192">ps</a>, <a href="https://arxiv.org/format/2003.02192">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1007/JHEP07(2020)016">10.1007/JHEP07(2020)016 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of energy flow, cross section and average inelasticity of forward neutrons produced in $\mathrm{\sqrt{s} = 13 TeV}$ proton-proton collisions with the LHCf Arm2 detector </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Adriani%2C+O">O. Adriani</a>, <a href="/search/hep-ex?searchtype=author&query=Berti%2C+E">E. Berti</a>, <a href="/search/hep-ex?searchtype=author&query=Bonechi%2C+L">L. Bonechi</a>, <a href="/search/hep-ex?searchtype=author&query=Bongi%2C+M">M. Bongi</a>, <a href="/search/hep-ex?searchtype=author&query=D%27Alessandro%2C+R">R. D'Alessandro</a>, <a href="/search/hep-ex?searchtype=author&query=Detti%2C+S">S. Detti</a>, <a href="/search/hep-ex?searchtype=author&query=Haguenauer%2C+M">M. Haguenauer</a>, <a href="/search/hep-ex?searchtype=author&query=Itow%2C+Y">Y. Itow</a>, <a href="/search/hep-ex?searchtype=author&query=Kasahara%2C+K">K. Kasahara</a>, <a href="/search/hep-ex?searchtype=author&query=Menjo%2C+H">H. Menjo</a>, <a href="/search/hep-ex?searchtype=author&query=Muraki%2C+Y">Y. Muraki</a>, <a href="/search/hep-ex?searchtype=author&query=Ohashi%2C+K">K. Ohashi</a>, <a href="/search/hep-ex?searchtype=author&query=Papini%2C+P">P. Papini</a>, <a href="/search/hep-ex?searchtype=author&query=Ricciarini%2C+S">S. Ricciarini</a>, <a href="/search/hep-ex?searchtype=author&query=Sako%2C+T">T. Sako</a>, <a href="/search/hep-ex?searchtype=author&query=Sakurai%2C+N">N. Sakurai</a>, <a href="/search/hep-ex?searchtype=author&query=Sato%2C+K">K. Sato</a>, <a href="/search/hep-ex?searchtype=author&query=Tamura%2C+T">T. Tamura</a>, <a href="/search/hep-ex?searchtype=author&query=Tiberio%2C+A">A. Tiberio</a>, <a href="/search/hep-ex?searchtype=author&query=Torii%2C+S">S. Torii</a>, <a href="/search/hep-ex?searchtype=author&query=Tricomi%2C+A">A. Tricomi</a>, <a href="/search/hep-ex?searchtype=author&query=Turner%2C+W+C">W. C. Turner</a>, <a href="/search/hep-ex?searchtype=author&query=Ueno%2C+M">M. Ueno</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2003.02192v3-abstract-short" style="display: inline;"> In this paper, we report the measurement of the energy flow, the cross section and the average inelasticity of forward neutrons (+ antineutrons) produced in $\sqrt{s} = 13$ TeV proton-proton collisions. These quantities are obtained from the inclusive differential production cross section, measured using the LHCf Arm2 detector at the CERN Large Hadron Collider. The measurements are performed in si… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2003.02192v3-abstract-full').style.display = 'inline'; document.getElementById('2003.02192v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2003.02192v3-abstract-full" style="display: none;"> In this paper, we report the measurement of the energy flow, the cross section and the average inelasticity of forward neutrons (+ antineutrons) produced in $\sqrt{s} = 13$ TeV proton-proton collisions. These quantities are obtained from the inclusive differential production cross section, measured using the LHCf Arm2 detector at the CERN Large Hadron Collider. The measurements are performed in six pseudorapidity regions: three of them ($畏> 10.75$, $8.99 < 畏< 9.21$ and $8.80 < 畏< 8.99$), albeit with smaller acceptance and larger uncertainties, were already published in a previous work, whereas the remaining three ($10.06 < 畏< 10.75$, $9.65 < 畏< 10.06$ and $8.65 < 畏< 8.80$) are presented here for the first time. The analysis was carried out using a data set acquired in June 2015 with a corresponding integrated luminosity of $\mathrm{0.194~nb^{-1}}$. Comparing the experimental measurements with the expectations of several hadronic interaction models used to simulate cosmic ray air showers, none of these generators resulted to have a satisfactory agreement in all the phase space selected for the analysis. The inclusive differential production cross section for $畏> 10.75$ is not reproduced by any model, whereas the results still indicate a significant but less serious deviation at lower pseudorapidities. Depending on the pseudorapidity region, the generators showing the best overall agreement with data are either SIBYLL 2.3 or EPOS-LHC. Furthermore, apart from the most forward region, the derived energy flow and cross section distributions are best reproduced by EPOS-LHC. Finally, even if none of the models describe the elasticity distribution in a satisfactory way, the extracted average inelasticity is consistent with the QGSJET II-04 value, while most of the other generators give values that lie just outside the experimental uncertainties. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2003.02192v3-abstract-full').style.display = 'none'; document.getElementById('2003.02192v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 10 July, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 4 March, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">22 pages, 11 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> CERN-EP-2020-029 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1808.09877">arXiv:1808.09877</a> <span> [<a href="https://arxiv.org/pdf/1808.09877">pdf</a>, <a href="https://arxiv.org/ps/1808.09877">ps</a>, <a href="https://arxiv.org/format/1808.09877">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1007/JHEP11(2018)073">10.1007/JHEP11(2018)073 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of inclusive forward neutron production cross section in proton-proton collisions at $\mathrm{\sqrt{s} = 13~TeV}$ with the LHCf Arm2 detector </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Adriani%2C+O">O. Adriani</a>, <a href="/search/hep-ex?searchtype=author&query=Berti%2C+E">E. Berti</a>, <a href="/search/hep-ex?searchtype=author&query=Bonechi%2C+L">L. Bonechi</a>, <a href="/search/hep-ex?searchtype=author&query=Bongi%2C+M">M. Bongi</a>, <a href="/search/hep-ex?searchtype=author&query=D%27Alessandro%2C+R">R. D'Alessandro</a>, <a href="/search/hep-ex?searchtype=author&query=Detti%2C+S">S. Detti</a>, <a href="/search/hep-ex?searchtype=author&query=Haguenauer%2C+M">M. Haguenauer</a>, <a href="/search/hep-ex?searchtype=author&query=Itow%2C+Y">Y. Itow</a>, <a href="/search/hep-ex?searchtype=author&query=Kasahara%2C+K">K. Kasahara</a>, <a href="/search/hep-ex?searchtype=author&query=Makino%2C+Y">Y. Makino</a>, <a href="/search/hep-ex?searchtype=author&query=Masuda%2C+K">K. Masuda</a>, <a href="/search/hep-ex?searchtype=author&query=Menjo%2C+H">H. Menjo</a>, <a href="/search/hep-ex?searchtype=author&query=Muraki%2C+Y">Y. Muraki</a>, <a href="/search/hep-ex?searchtype=author&query=Ohashi%2C+K">K. Ohashi</a>, <a href="/search/hep-ex?searchtype=author&query=Papini%2C+P">P. Papini</a>, <a href="/search/hep-ex?searchtype=author&query=Ricciarini%2C+S">S. Ricciarini</a>, <a href="/search/hep-ex?searchtype=author&query=Sako%2C+T">T. Sako</a>, <a href="/search/hep-ex?searchtype=author&query=Sakurai%2C+N">N. Sakurai</a>, <a href="/search/hep-ex?searchtype=author&query=Sato%2C+K">K. Sato</a>, <a href="/search/hep-ex?searchtype=author&query=Shinoda%2C+M">M. Shinoda</a>, <a href="/search/hep-ex?searchtype=author&query=Suzuki%2C+T">T. Suzuki</a>, <a href="/search/hep-ex?searchtype=author&query=Tamura%2C+T">T. Tamura</a>, <a href="/search/hep-ex?searchtype=author&query=Tiberio%2C+A">A. Tiberio</a>, <a href="/search/hep-ex?searchtype=author&query=Torii%2C+S">S. Torii</a>, <a href="/search/hep-ex?searchtype=author&query=Tricomi%2C+A">A. Tricomi</a> , et al. (3 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1808.09877v2-abstract-short" style="display: inline;"> In this paper, we report the measurement relative to the production of forward neutrons in proton-proton collisions at $\mathrm{\sqrt{s} = 13~TeV}$ obtained using the LHCf Arm2 detector at the Large Hadron Collider. The results for the inclusive differential production cross section are presented as a function of energy in three different pseudorapidity regions: $畏> 10.76$, $8.99 < 畏< 9.22$ and… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1808.09877v2-abstract-full').style.display = 'inline'; document.getElementById('1808.09877v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1808.09877v2-abstract-full" style="display: none;"> In this paper, we report the measurement relative to the production of forward neutrons in proton-proton collisions at $\mathrm{\sqrt{s} = 13~TeV}$ obtained using the LHCf Arm2 detector at the Large Hadron Collider. The results for the inclusive differential production cross section are presented as a function of energy in three different pseudorapidity regions: $畏> 10.76$, $8.99 < 畏< 9.22$ and $8.81 < 畏< 8.99$. The analysis was performed using a data set acquired in June 2015 that corresponds to an integrated luminosity of $\mathrm{0.194~nb^{-1}}$. The measurements were compared with the predictions of several hadronic interaction models used to simulate air showers generated by Ultra High Energy Cosmic Rays. None of these generators showed good agreement with the data for all pseudorapidity intervals. For $畏> 10.76$, no model is able to reproduce the observed peak structure at around $\mathrm{5~TeV}$ and all models underestimate the total production cross section: among them, QGSJET II-04 shows the smallest deficit with respect to data for the whole energy range. For $8.99 < 畏< 9.22$ and $8.81 < 畏< 8.99$, the models having the best overall agreement with data are SIBYLL 2.3 and EPOS-LHC, respectively: in particular, in both regions SIBYLL 2.3 is able to reproduce the observed peak structure at around $\mathrm{1.5-2.5~TeV}$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1808.09877v2-abstract-full').style.display = 'none'; document.getElementById('1808.09877v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 29 November, 2018; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 29 August, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2018. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> CERN-EP-2018-239 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> The LHCf collaboration, Adriani, O., Berti, E. et al. J. High Energ. Phys. (2018) 2018: 73 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1703.07678">arXiv:1703.07678</a> <span> [<a href="https://arxiv.org/pdf/1703.07678">pdf</a>, <a href="https://arxiv.org/ps/1703.07678">ps</a>, <a href="https://arxiv.org/format/1703.07678">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.physletb.2017.12.050">10.1016/j.physletb.2017.12.050 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of forward photon production cross-section in proton-proton collisions at $\sqrt{s}$ = 13 TeV with the LHCf detector </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Adriani%2C+O">O. Adriani</a>, <a href="/search/hep-ex?searchtype=author&query=Berti%2C+E">E. Berti</a>, <a href="/search/hep-ex?searchtype=author&query=Bonechi%2C+L">L. Bonechi</a>, <a href="/search/hep-ex?searchtype=author&query=Bongi%2C+M">M. Bongi</a>, <a href="/search/hep-ex?searchtype=author&query=D%27Alessandro%2C+R">R. D'Alessandro</a>, <a href="/search/hep-ex?searchtype=author&query=Haguenauer%2C+M">M. Haguenauer</a>, <a href="/search/hep-ex?searchtype=author&query=Itow%2C+Y">Y. Itow</a>, <a href="/search/hep-ex?searchtype=author&query=Iwata%2C+T">T. Iwata</a>, <a href="/search/hep-ex?searchtype=author&query=Kasahara%2C+K">K. Kasahara</a>, <a href="/search/hep-ex?searchtype=author&query=Makino%2C+Y">Y. Makino</a>, <a href="/search/hep-ex?searchtype=author&query=Masuda%2C+K">K. Masuda</a>, <a href="/search/hep-ex?searchtype=author&query=Matsubayashi%2C+E">E. Matsubayashi</a>, <a href="/search/hep-ex?searchtype=author&query=Menjo%2C+H">H. Menjo</a>, <a href="/search/hep-ex?searchtype=author&query=Muraki%2C+Y">Y. Muraki</a>, <a href="/search/hep-ex?searchtype=author&query=Papini%2C+P">P. Papini</a>, <a href="/search/hep-ex?searchtype=author&query=Ricciarini%2C+S">S. Ricciarini</a>, <a href="/search/hep-ex?searchtype=author&query=Sako%2C+T">T. Sako</a>, <a href="/search/hep-ex?searchtype=author&query=Sakurai%2C+N">N. Sakurai</a>, <a href="/search/hep-ex?searchtype=author&query=Shinoda%2C+M">M. Shinoda</a>, <a href="/search/hep-ex?searchtype=author&query=Suzuki%2C+T">T. Suzuki</a>, <a href="/search/hep-ex?searchtype=author&query=Tamura%2C+T">T. Tamura</a>, <a href="/search/hep-ex?searchtype=author&query=Tiberio%2C+A">A. Tiberio</a>, <a href="/search/hep-ex?searchtype=author&query=Torii%2C+S">S. Torii</a>, <a href="/search/hep-ex?searchtype=author&query=Tricomi%2C+A">A. Tricomi</a>, <a href="/search/hep-ex?searchtype=author&query=Turner%2C+W+C">W. C. Turner</a> , et al. (2 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1703.07678v2-abstract-short" style="display: inline;"> In this paper, we report the production cross-section of forward photons in the pseudorapidity regions of $畏\,>\,10.94$ and $8.99\,>\,畏\,>\,8.81$, measured by the LHCf experiment with proton--proton collisions at $\sqrt{s}$ = 13 TeV. The results from the analysis of 0.191 $\mathrm{nb^{-1}}$ of data obtained in June 2015 are compared to the predictions of several hadronic interaction models that ar… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1703.07678v2-abstract-full').style.display = 'inline'; document.getElementById('1703.07678v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1703.07678v2-abstract-full" style="display: none;"> In this paper, we report the production cross-section of forward photons in the pseudorapidity regions of $畏\,>\,10.94$ and $8.99\,>\,畏\,>\,8.81$, measured by the LHCf experiment with proton--proton collisions at $\sqrt{s}$ = 13 TeV. The results from the analysis of 0.191 $\mathrm{nb^{-1}}$ of data obtained in June 2015 are compared to the predictions of several hadronic interaction models that are used in air-shower simulations for ultra-high-energy cosmic rays. Although none of the models agree perfectly with the data, EPOS-LHC shows the best agreement with the experimental data among the models. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1703.07678v2-abstract-full').style.display = 'none'; document.getElementById('1703.07678v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 24 November, 2017; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 22 March, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2017. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">21 pages, 4 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> CERN-EP-DRAFT-LHCf-2017-001 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1602.05509">arXiv:1602.05509</a> <span> [<a href="https://arxiv.org/pdf/1602.05509">pdf</a>, <a href="https://arxiv.org/ps/1602.05509">ps</a>, <a href="https://arxiv.org/format/1602.05509">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Space Physics">physics.space-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Earth and Planetary Astrophysics">astro-ph.EP</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1002/2016SW001364">10.1002/2016SW001364 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> PAMELA's measurements of geomagnetic cutoff variations during the 14 December 2006 storm </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Adriani%2C+O">O. Adriani</a>, <a href="/search/hep-ex?searchtype=author&query=Barbarino%2C+G+C">G. C. Barbarino</a>, <a href="/search/hep-ex?searchtype=author&query=Bazilevskaya%2C+G+A">G. A. Bazilevskaya</a>, <a href="/search/hep-ex?searchtype=author&query=Bellotti%2C+R">R. Bellotti</a>, <a href="/search/hep-ex?searchtype=author&query=Boezio%2C+M">M. Boezio</a>, <a href="/search/hep-ex?searchtype=author&query=Bogomolov%2C+E+A">E. A. Bogomolov</a>, <a href="/search/hep-ex?searchtype=author&query=Bongi%2C+M">M. Bongi</a>, <a href="/search/hep-ex?searchtype=author&query=Bonvicini%2C+V">V. Bonvicini</a>, <a href="/search/hep-ex?searchtype=author&query=Bottai%2C+S">S. Bottai</a>, <a href="/search/hep-ex?searchtype=author&query=Bruno%2C+A">A. Bruno</a>, <a href="/search/hep-ex?searchtype=author&query=Cafagna%2C+F">F. Cafagna</a>, <a href="/search/hep-ex?searchtype=author&query=Campana%2C+D">D. Campana</a>, <a href="/search/hep-ex?searchtype=author&query=Carlson%2C+P">P. Carlson</a>, <a href="/search/hep-ex?searchtype=author&query=Casolino%2C+M">M. Casolino</a>, <a href="/search/hep-ex?searchtype=author&query=Castellini%2C+G">G. Castellini</a>, <a href="/search/hep-ex?searchtype=author&query=De+Donato%2C+C">C. De Donato</a>, <a href="/search/hep-ex?searchtype=author&query=de+Nolfo%2C+G+A">G. A. de Nolfo</a>, <a href="/search/hep-ex?searchtype=author&query=De+Santis%2C+C">C. De Santis</a>, <a href="/search/hep-ex?searchtype=author&query=De+Simone%2C+N">N. De Simone</a>, <a href="/search/hep-ex?searchtype=author&query=Di+Felice%2C+V">V. Di Felice</a>, <a href="/search/hep-ex?searchtype=author&query=Galper%2C+A+M">A. M. Galper</a>, <a href="/search/hep-ex?searchtype=author&query=Karelin%2C+A+V">A. V. Karelin</a>, <a href="/search/hep-ex?searchtype=author&query=Koldashov%2C+S+V">S. V. Koldashov</a>, <a href="/search/hep-ex?searchtype=author&query=Koldobskiy%2C+S">S. Koldobskiy</a>, <a href="/search/hep-ex?searchtype=author&query=Krutkov%2C+S+Y">S. Y. Krutkov</a> , et al. (33 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1602.05509v2-abstract-short" style="display: inline;"> Data from the Payload for Antimatter Matter Exploration and Light-nuclei Astrophysics (PAMELA) satellite experiment were used to measure the geomagnetic cutoff for high-energy (>80 MeV) protons during the 14 December 2006 geomagnetic storm. The variations of the cutoff latitude as a function of rigidity were studied on relatively short timescales, corresponding to spacecraft orbital periods (94 mi… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1602.05509v2-abstract-full').style.display = 'inline'; document.getElementById('1602.05509v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1602.05509v2-abstract-full" style="display: none;"> Data from the Payload for Antimatter Matter Exploration and Light-nuclei Astrophysics (PAMELA) satellite experiment were used to measure the geomagnetic cutoff for high-energy (>80 MeV) protons during the 14 December 2006 geomagnetic storm. The variations of the cutoff latitude as a function of rigidity were studied on relatively short timescales, corresponding to spacecraft orbital periods (94 min). Estimated cutoff values were compared with those obtained by means of a trajectory tracing approach based on a dynamical empirical modeling of the Earth's magnetosphere. We found significant variations in the cutoff latitude, with a maximum suppression of about 7 deg at lowest rigidities during the main phase of the storm. The observed reduction in the geomagnetic shielding and its temporal evolution were related to the changes in the magnetospheric configuration, investigating the role of interplanetary magnetic field, solar wind and geomagnetic parameters. PAMELA's results represent the first direct measurement of geomagnetic cutoffs for protons with kinetic energies in the sub-GeV and GeV region. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1602.05509v2-abstract-full').style.display = 'none'; document.getElementById('1602.05509v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 3 March, 2016; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 17 February, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2016. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">26 pages, 6 figures and 1 table. Accepted for publication in Space Weather</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1507.08764">arXiv:1507.08764</a> <span> [<a href="https://arxiv.org/pdf/1507.08764">pdf</a>, <a href="https://arxiv.org/format/1507.08764">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevD.94.032007">10.1103/PhysRevD.94.032007 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurements of longitudinal and transverse momentum distributions for neutral pions in the forward-rapidity region with the LHCf detector </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Adriani%2C+O">O. Adriani</a>, <a href="/search/hep-ex?searchtype=author&query=Berti%2C+E">E. Berti</a>, <a href="/search/hep-ex?searchtype=author&query=Bonechi%2C+L">L. Bonechi</a>, <a href="/search/hep-ex?searchtype=author&query=Bongi%2C+M">M. Bongi</a>, <a href="/search/hep-ex?searchtype=author&query=D%27Alessandro%2C+R">R. D'Alessandro</a>, <a href="/search/hep-ex?searchtype=author&query=Del+Prete%2C+M">M. Del Prete</a>, <a href="/search/hep-ex?searchtype=author&query=Haguenauer%2C+M">M. Haguenauer</a>, <a href="/search/hep-ex?searchtype=author&query=Itow%2C+Y">Y. Itow</a>, <a href="/search/hep-ex?searchtype=author&query=Kasahara%2C+K">K. Kasahara</a>, <a href="/search/hep-ex?searchtype=author&query=Kawade%2C+K">K. Kawade</a>, <a href="/search/hep-ex?searchtype=author&query=Makino%2C+Y">Y. Makino</a>, <a href="/search/hep-ex?searchtype=author&query=Masuda%2C+K">K. Masuda</a>, <a href="/search/hep-ex?searchtype=author&query=Matsubayashi%2C+E">E. Matsubayashi</a>, <a href="/search/hep-ex?searchtype=author&query=Menjo%2C+H">H. Menjo</a>, <a href="/search/hep-ex?searchtype=author&query=Mitsuka%2C+G">G. Mitsuka</a>, <a href="/search/hep-ex?searchtype=author&query=Muraki%2C+Y">Y. Muraki</a>, <a href="/search/hep-ex?searchtype=author&query=Papini%2C+P">P. Papini</a>, <a href="/search/hep-ex?searchtype=author&query=Perrot%2C+A+-">A. -L. Perrot</a>, <a href="/search/hep-ex?searchtype=author&query=Ricciarini%2C+S">S. Ricciarini</a>, <a href="/search/hep-ex?searchtype=author&query=Sako%2C+T">T. Sako</a>, <a href="/search/hep-ex?searchtype=author&query=Sakurai%2C+N">N. Sakurai</a>, <a href="/search/hep-ex?searchtype=author&query=Suzuki%2C+T">T. Suzuki</a>, <a href="/search/hep-ex?searchtype=author&query=Tamura%2C+T">T. Tamura</a>, <a href="/search/hep-ex?searchtype=author&query=Tiberio%2C+A">A. Tiberio</a>, <a href="/search/hep-ex?searchtype=author&query=Torii%2C+S">S. Torii</a> , et al. (3 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1507.08764v3-abstract-short" style="display: inline;"> The differential cross sections for inclusive neutral pions as a function of transverse and longitudinal momentum in the very forward rapidity region have been measured at the Large Hadron Collider (LHC) with the Large Hadron Collider forward detector (LHCf) in proton-proton collisions at $\sqrt{s}=$ 2.76 and 7 TeV and in proton-lead collisions at nucleon-nucleon center-of-mass energies of… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1507.08764v3-abstract-full').style.display = 'inline'; document.getElementById('1507.08764v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1507.08764v3-abstract-full" style="display: none;"> The differential cross sections for inclusive neutral pions as a function of transverse and longitudinal momentum in the very forward rapidity region have been measured at the Large Hadron Collider (LHC) with the Large Hadron Collider forward detector (LHCf) in proton-proton collisions at $\sqrt{s}=$ 2.76 and 7 TeV and in proton-lead collisions at nucleon-nucleon center-of-mass energies of $\sqrt{s_\text{NN}}=$ 5.02 TeV. Such differential cross sections in proton-proton collisions are compatible with the hypotheses of limiting fragmentation and Feynman scaling. Comparing proton-proton with proton-lead collisions, we find a sizable suppression of the production of neutral pions in the differential cross sections after subtraction of ultra-peripheral proton-lead collisions. This suppression corresponds to the nuclear modification factor value of about 0.1-0.3. The experimental measurements presented in this paper provide a benchmark for the hadronic interaction Monte Carlo simulation codes that are used for the simulation of cosmic ray air showers. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1507.08764v3-abstract-full').style.display = 'none'; document.getElementById('1507.08764v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 2 August, 2016; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 31 July, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2015. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">47 pages, 23 figures, 59 tables, accepted in PRD</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> CERN-PH-EP-2015-201 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 94, 032007 (2016) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1503.03505">arXiv:1503.03505</a> <span> [<a href="https://arxiv.org/pdf/1503.03505">pdf</a>, <a href="https://arxiv.org/ps/1503.03505">ps</a>, <a href="https://arxiv.org/format/1503.03505">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.physletb.2015.09.041">10.1016/j.physletb.2015.09.041 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of very forward neutron energy spectra for 7 TeV proton--proton collisions at the Large Hadron Collider </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Adriani%2C+O">O. Adriani</a>, <a href="/search/hep-ex?searchtype=author&query=Berti%2C+E">E. Berti</a>, <a href="/search/hep-ex?searchtype=author&query=Bonechi%2C+L">L. Bonechi</a>, <a href="/search/hep-ex?searchtype=author&query=Bongi%2C+M">M. Bongi</a>, <a href="/search/hep-ex?searchtype=author&query=Castellini%2C+G">G. Castellini</a>, <a href="/search/hep-ex?searchtype=author&query=D%27Alessandro%2C+R">R. D'Alessandro</a>, <a href="/search/hep-ex?searchtype=author&query=Del+Prete%2C+M">M. Del Prete</a>, <a href="/search/hep-ex?searchtype=author&query=Haguenauer%2C+M">M. Haguenauer</a>, <a href="/search/hep-ex?searchtype=author&query=Itow%2C+Y">Y. Itow</a>, <a href="/search/hep-ex?searchtype=author&query=Kasahara%2C+K">K. Kasahara</a>, <a href="/search/hep-ex?searchtype=author&query=Kawade%2C+K">K. Kawade</a>, <a href="/search/hep-ex?searchtype=author&query=Makino%2C+Y">Y. Makino</a>, <a href="/search/hep-ex?searchtype=author&query=Masuda%2C+K">K. Masuda</a>, <a href="/search/hep-ex?searchtype=author&query=Matsubayashi%2C+E">E. Matsubayashi</a>, <a href="/search/hep-ex?searchtype=author&query=Menjo%2C+H">H. Menjo</a>, <a href="/search/hep-ex?searchtype=author&query=Mitsuka%2C+G">G. Mitsuka</a>, <a href="/search/hep-ex?searchtype=author&query=Muraki%2C+Y">Y. Muraki</a>, <a href="/search/hep-ex?searchtype=author&query=Okuno%2C+Y">Y. Okuno</a>, <a href="/search/hep-ex?searchtype=author&query=Papini%2C+P">P. Papini</a>, <a href="/search/hep-ex?searchtype=author&query=Perrot%2C+A">A-L. Perrot</a>, <a href="/search/hep-ex?searchtype=author&query=Ricciarini%2C+S">S. Ricciarini</a>, <a href="/search/hep-ex?searchtype=author&query=Sako%2C+T">T. Sako</a>, <a href="/search/hep-ex?searchtype=author&query=Sakurai%2C+N">N. Sakurai</a>, <a href="/search/hep-ex?searchtype=author&query=Sugiura%2C+Y">Y. Sugiura</a>, <a href="/search/hep-ex?searchtype=author&query=Suzuki%2C+T">T. Suzuki</a> , et al. (6 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1503.03505v1-abstract-short" style="display: inline;"> The Large Hadron Collider forward (LHCf) experiment is designed to use the LHC to verify the hadronic-interaction models used in cosmic-ray physics. Forward baryon production is one of the crucial points to understand the development of cosmic-ray showers. We report the neutron-energy spectra for LHC $\sqrt{s}$ = 7 TeV proton--proton collisions with the pseudo-rapidity $畏$ ranging from 8.81 to 8.9… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1503.03505v1-abstract-full').style.display = 'inline'; document.getElementById('1503.03505v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1503.03505v1-abstract-full" style="display: none;"> The Large Hadron Collider forward (LHCf) experiment is designed to use the LHC to verify the hadronic-interaction models used in cosmic-ray physics. Forward baryon production is one of the crucial points to understand the development of cosmic-ray showers. We report the neutron-energy spectra for LHC $\sqrt{s}$ = 7 TeV proton--proton collisions with the pseudo-rapidity $畏$ ranging from 8.81 to 8.99, from 8.99 to 9.22, and from 10.76 to infinity. The measured energy spectra obtained from the two independent calorimeters of Arm1 and Arm2 show the same characteristic feature before unfolding the difference in the detector responses. We unfolded the measured spectra by using the multidimensional unfolding method based on Bayesian theory, and the unfolded spectra were compared with current hadronic-interaction models. The QGSJET II-03 model predicts a high neutron production rate at the highest pseudo-rapidity range similar to our results and the DPMJET 3.04 model describes our results well at the lower pseudo-rapidity ranges. However no model perfectly explains the experimental results in the whole pseudo-rapidity range. The experimental data indicate the most abundant neutron production rate relative to the photon production, which does not agree with predictions of the models. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1503.03505v1-abstract-full').style.display = 'none'; document.getElementById('1503.03505v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 11 March, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2015. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">10pages, 6 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> CERN-PH-EP-2015-056 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1403.7845">arXiv:1403.7845</a> <span> [<a href="https://arxiv.org/pdf/1403.7845">pdf</a>, <a href="https://arxiv.org/ps/1403.7845">ps</a>, <a href="https://arxiv.org/format/1403.7845">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.89.065209">10.1103/PhysRevC.89.065209 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Transverse momentum distribution and nuclear modification factor of forward neutral pion in proton--lead collisions at $\sqrt{s_{NN}} = 5.02$TeV </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Adriani%2C+O">O. Adriani</a>, <a href="/search/hep-ex?searchtype=author&query=Berti%2C+E">E. Berti</a>, <a href="/search/hep-ex?searchtype=author&query=Bonechi%2C+L">L. Bonechi</a>, <a href="/search/hep-ex?searchtype=author&query=Bongi%2C+M">M. Bongi</a>, <a href="/search/hep-ex?searchtype=author&query=Castellini%2C+G">G. Castellini</a>, <a href="/search/hep-ex?searchtype=author&query=D%27Alessandro%2C+R">R. D'Alessandro</a>, <a href="/search/hep-ex?searchtype=author&query=Del+Prete%2C+M">M. Del Prete</a>, <a href="/search/hep-ex?searchtype=author&query=Haguenauer%2C+M">M. Haguenauer</a>, <a href="/search/hep-ex?searchtype=author&query=Itow%2C+Y">Y. Itow</a>, <a href="/search/hep-ex?searchtype=author&query=Kasahara%2C+K">K. Kasahara</a>, <a href="/search/hep-ex?searchtype=author&query=Kawade%2C+K">K. Kawade</a>, <a href="/search/hep-ex?searchtype=author&query=Makino%2C+Y">Y. Makino</a>, <a href="/search/hep-ex?searchtype=author&query=Masuda%2C+K">K. Masuda</a>, <a href="/search/hep-ex?searchtype=author&query=Matsubayashi%2C+E">E. Matsubayashi</a>, <a href="/search/hep-ex?searchtype=author&query=Menjo%2C+H">H. Menjo</a>, <a href="/search/hep-ex?searchtype=author&query=Mitsuka%2C+G">G. Mitsuka</a>, <a href="/search/hep-ex?searchtype=author&query=Muraki%2C+Y">Y. Muraki</a>, <a href="/search/hep-ex?searchtype=author&query=Papini%2C+P">P. Papini</a>, <a href="/search/hep-ex?searchtype=author&query=Perrot%2C+A+-">A. -L. Perrot</a>, <a href="/search/hep-ex?searchtype=author&query=Pfeiffer%2C+D">D. Pfeiffer</a>, <a href="/search/hep-ex?searchtype=author&query=Ricciarini%2C+S">S. Ricciarini</a>, <a href="/search/hep-ex?searchtype=author&query=Sako%2C+T">T. Sako</a>, <a href="/search/hep-ex?searchtype=author&query=Sakurai%2C+N">N. Sakurai</a>, <a href="/search/hep-ex?searchtype=author&query=Suzuki%2C+T">T. Suzuki</a>, <a href="/search/hep-ex?searchtype=author&query=Tamura%2C+T">T. Tamura</a> , et al. (4 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1403.7845v2-abstract-short" style="display: inline;"> The transverse momentum ($p_\text{T}$) distribution for inclusive neutral pions in the very forward rapidity region has been measured, with the Large Hadron Collider forward detector (LHCf), in proton--lead collisions at nucleon-nucleon center-of-mass energies of $\sqrt{s_{NN}} = 5.02$TeV at the LHC. The $p_\text{T}$ spectra obtained in the rapidity range $-11.0 < y_\text{lab} < -8.9$ and… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1403.7845v2-abstract-full').style.display = 'inline'; document.getElementById('1403.7845v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1403.7845v2-abstract-full" style="display: none;"> The transverse momentum ($p_\text{T}$) distribution for inclusive neutral pions in the very forward rapidity region has been measured, with the Large Hadron Collider forward detector (LHCf), in proton--lead collisions at nucleon-nucleon center-of-mass energies of $\sqrt{s_{NN}} = 5.02$TeV at the LHC. The $p_\text{T}$ spectra obtained in the rapidity range $-11.0 < y_\text{lab} < -8.9$ and $0 < p_\text{T} < 0.6$GeV (in the detector reference frame) show a strong suppression of the production of neutral pions after taking into account ultra-peripheral collisions. This leads to a nuclear modification factor value, relative to the interpolated $p_\text{T}$ spectra in proton-proton collisions at $\sqrt{s} = 5.02$TeV, of about 0.1--0.4. This value is compared with the predictions of several hadronic interaction Monte Carlo simulations. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1403.7845v2-abstract-full').style.display = 'none'; document.getElementById('1403.7845v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 10 June, 2014; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 30 March, 2014; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2014. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">13 pages, 7 figures; 9 tables, accepted in Phys. Rev. C</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> CERN-PH-EP-2014-059 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev C. 89, 065209 (2014) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1312.5950">arXiv:1312.5950</a> <span> [<a href="https://arxiv.org/pdf/1312.5950">pdf</a>, <a href="https://arxiv.org/ps/1312.5950">ps</a>, <a href="https://arxiv.org/format/1312.5950">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1748-0221/9/03/P03016">10.1088/1748-0221/9/03/P03016 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The performance of the LHCf detector for hadronic showers </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Kawade%2C+K">K. Kawade</a>, <a href="/search/hep-ex?searchtype=author&query=Adriani%2C+O">O. Adriani</a>, <a href="/search/hep-ex?searchtype=author&query=Bonechi%2C+L">L. Bonechi</a>, <a href="/search/hep-ex?searchtype=author&query=Bongi%2C+M">M. Bongi</a>, <a href="/search/hep-ex?searchtype=author&query=Castellini%2C+G">G. Castellini</a>, <a href="/search/hep-ex?searchtype=author&query=DAlessandro%2C+R">R. DAlessandro</a>, <a href="/search/hep-ex?searchtype=author&query=Del+Prete%2C+M">M. Del Prete</a>, <a href="/search/hep-ex?searchtype=author&query=Haguenauer%2C+M">M. Haguenauer</a>, <a href="/search/hep-ex?searchtype=author&query=Itow%2C+Y">Y. Itow</a>, <a href="/search/hep-ex?searchtype=author&query=Kasahara%2C+K">K. Kasahara</a>, <a href="/search/hep-ex?searchtype=author&query=Makino%2C+Y">Y. Makino</a>, <a href="/search/hep-ex?searchtype=author&query=Masuda%2C+K">K. Masuda</a>, <a href="/search/hep-ex?searchtype=author&query=Matsubayashi%2C+E">E. Matsubayashi</a>, <a href="/search/hep-ex?searchtype=author&query=Menjo%2C+H">H. Menjo</a>, <a href="/search/hep-ex?searchtype=author&query=Mitsuka%2C+G">G. Mitsuka</a>, <a href="/search/hep-ex?searchtype=author&query=Muraki%2C+Y">Y. Muraki</a>, <a href="/search/hep-ex?searchtype=author&query=Papini%2C+P">P. Papini</a>, <a href="/search/hep-ex?searchtype=author&query=Perrot%2C+A">A-L. Perrot</a>, <a href="/search/hep-ex?searchtype=author&query=Ricciarini%2C+S">S. Ricciarini</a>, <a href="/search/hep-ex?searchtype=author&query=Sako%2C+T">T. Sako</a>, <a href="/search/hep-ex?searchtype=author&query=Sakurai%2C+N">N. Sakurai</a>, <a href="/search/hep-ex?searchtype=author&query=Shimizu%2C+Y">Y. Shimizu</a>, <a href="/search/hep-ex?searchtype=author&query=Suzuki%2C+T">T. Suzuki</a>, <a href="/search/hep-ex?searchtype=author&query=Tamura%2C+T">T. Tamura</a>, <a href="/search/hep-ex?searchtype=author&query=Torii%2C+S">S. Torii</a> , et al. (2 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1312.5950v1-abstract-short" style="display: inline;"> The Large Hadron Collider forward (LHCf) experiment has been designed to use the LHC to benchmark the hadronic interaction models used in cosmic-ray physics. The LHCf experiment measures neutral particles emitted in the very forward region of LHC collisions. In this paper, the performances of the LHCf detectors for hadronic showers was studied with MC simulations and beam tests. The detection effi… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1312.5950v1-abstract-full').style.display = 'inline'; document.getElementById('1312.5950v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1312.5950v1-abstract-full" style="display: none;"> The Large Hadron Collider forward (LHCf) experiment has been designed to use the LHC to benchmark the hadronic interaction models used in cosmic-ray physics. The LHCf experiment measures neutral particles emitted in the very forward region of LHC collisions. In this paper, the performances of the LHCf detectors for hadronic showers was studied with MC simulations and beam tests. The detection efficiency for neutrons is from 60% to 70% above 500 GeV. The energy resolutions are about 40% and the position resolution is 0.1 to 1.3mm depend on the incident energy for neutrons. The energy scale determined by the MC simulations and the validity of the MC simulations were examined using 350 GeV proton beams at the CERN-SPS. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1312.5950v1-abstract-full').style.display = 'none'; document.getElementById('1312.5950v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 20 December, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2013. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">15pages, 19 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1207.7183">arXiv:1207.7183</a> <span> [<a href="https://arxiv.org/pdf/1207.7183">pdf</a>, <a href="https://arxiv.org/ps/1207.7183">ps</a>, <a href="https://arxiv.org/format/1207.7183">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.physletb.2012.07.065">10.1016/j.physletb.2012.07.065 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of zero degree inclusive photon energy spectra for $\sqrt{s}=$ 900 GeV proton-proton collisions at LHC </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Adriani%2C+O">O. Adriani</a>, <a href="/search/hep-ex?searchtype=author&query=Bonechi%2C+L">L. Bonechi</a>, <a href="/search/hep-ex?searchtype=author&query=Bongi%2C+M">M. Bongi</a>, <a href="/search/hep-ex?searchtype=author&query=Castellini%2C+G">G. Castellini</a>, <a href="/search/hep-ex?searchtype=author&query=D%27Alessandro%2C+R">R. D'Alessandro</a>, <a href="/search/hep-ex?searchtype=author&query=Fukatsu%2C+K">K. Fukatsu</a>, <a href="/search/hep-ex?searchtype=author&query=Haguenauer%2C+M">M. Haguenauer</a>, <a href="/search/hep-ex?searchtype=author&query=Iso%2C+T">T. Iso</a>, <a href="/search/hep-ex?searchtype=author&query=Itow%2C+Y">Y. Itow</a>, <a href="/search/hep-ex?searchtype=author&query=Kasahara%2C+K">K. Kasahara</a>, <a href="/search/hep-ex?searchtype=author&query=Kawade%2C+K">K. Kawade</a>, <a href="/search/hep-ex?searchtype=author&query=Mase%2C+T">T. Mase</a>, <a href="/search/hep-ex?searchtype=author&query=Masuda%2C+K">K. Masuda</a>, <a href="/search/hep-ex?searchtype=author&query=Menjo%2C+H">H. Menjo</a>, <a href="/search/hep-ex?searchtype=author&query=Mitsuka%2C+G">G. Mitsuka</a>, <a href="/search/hep-ex?searchtype=author&query=Muraki%2C+Y">Y. Muraki</a>, <a href="/search/hep-ex?searchtype=author&query=Noda%2C+K">K. Noda</a>, <a href="/search/hep-ex?searchtype=author&query=Papini%2C+P">P. Papini</a>, <a href="/search/hep-ex?searchtype=author&query=Perrot%2C+A+-">A. -L. Perrot</a>, <a href="/search/hep-ex?searchtype=author&query=Ricciarini%2C+S">S. Ricciarini</a>, <a href="/search/hep-ex?searchtype=author&query=Sako%2C+T">T. Sako</a>, <a href="/search/hep-ex?searchtype=author&query=Suzuki%2C+K">K. Suzuki</a>, <a href="/search/hep-ex?searchtype=author&query=Suzuki%2C+T">T. Suzuki</a>, <a href="/search/hep-ex?searchtype=author&query=Taki%2C+K">K. Taki</a>, <a href="/search/hep-ex?searchtype=author&query=Tamura%2C+T">T. Tamura</a> , et al. (3 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1207.7183v1-abstract-short" style="display: inline;"> The inclusive photon energy spectra measured by the Large Hadron Collider forward (LHCf) experiment in the very forward region of LHC proton-proton collisions at $\sqrt{s}=$ 900 GeV are reported. The results from the analysis of 0.30 $\mathrm{nb^{-1}}$ of data collected in May 2010 in the two pseudorapidity regions of $畏> 10.15$ and $8.77 < 畏< 9.46$ are compared with the predictions of the hadroni… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1207.7183v1-abstract-full').style.display = 'inline'; document.getElementById('1207.7183v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1207.7183v1-abstract-full" style="display: none;"> The inclusive photon energy spectra measured by the Large Hadron Collider forward (LHCf) experiment in the very forward region of LHC proton-proton collisions at $\sqrt{s}=$ 900 GeV are reported. The results from the analysis of 0.30 $\mathrm{nb^{-1}}$ of data collected in May 2010 in the two pseudorapidity regions of $畏> 10.15$ and $8.77 < 畏< 9.46$ are compared with the predictions of the hadronic interaction models DPMJET 3.04, EPOS 1.99, PYTHIA 8.145, QGSJET I -.1em I-03 and SIBYLL 2.1, which are widely used in ultra-high-energy cosmic-ray experiments. EPOS 1.99 and SYBILL 2.1 show a reasonable agreement with the spectral shape of the experimental data, whereas they predict lower cross-sections than the data. The other models, DPMJET 3.04, QGSJET I -.1em I-03 and PYTHIA 8.145, are in good agreement with the data below 300 GeV but predict harder energy spectra than the data above 300 GeV. The results of these comparisons exhibited features similar to those for the previously reported data for $\sqrt{s}=$ 7 TeV collisions. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1207.7183v1-abstract-full').style.display = 'none'; document.getElementById('1207.7183v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 31 July, 2012; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2012. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1205.4578">arXiv:1205.4578</a> <span> [<a href="https://arxiv.org/pdf/1205.4578">pdf</a>, <a href="https://arxiv.org/ps/1205.4578">ps</a>, <a href="https://arxiv.org/format/1205.4578">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevD.86.092001">10.1103/PhysRevD.86.092001 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of forward neutral pion transverse momentum spectra for $\sqrt{s}$ = 7TeV proton-proton collisions at LHC </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Adriani%2C+O">O. Adriani</a>, <a href="/search/hep-ex?searchtype=author&query=Bonechi%2C+L">L. Bonechi</a>, <a href="/search/hep-ex?searchtype=author&query=Bongi%2C+M">M. Bongi</a>, <a href="/search/hep-ex?searchtype=author&query=Castellini%2C+G">G. Castellini</a>, <a href="/search/hep-ex?searchtype=author&query=D%27Alessandro%2C+R">R. D'Alessandro</a>, <a href="/search/hep-ex?searchtype=author&query=Fukatsu%2C+K">K. Fukatsu</a>, <a href="/search/hep-ex?searchtype=author&query=Haguenauer%2C+M">M. Haguenauer</a>, <a href="/search/hep-ex?searchtype=author&query=Iso%2C+T">T. Iso</a>, <a href="/search/hep-ex?searchtype=author&query=Itow%2C+Y">Y. Itow</a>, <a href="/search/hep-ex?searchtype=author&query=Kasahara%2C+K">K. Kasahara</a>, <a href="/search/hep-ex?searchtype=author&query=Kawade%2C+K">K. Kawade</a>, <a href="/search/hep-ex?searchtype=author&query=Mase%2C+T">T. Mase</a>, <a href="/search/hep-ex?searchtype=author&query=Masuda%2C+K">K. Masuda</a>, <a href="/search/hep-ex?searchtype=author&query=Menjo%2C+H">H. Menjo</a>, <a href="/search/hep-ex?searchtype=author&query=Mitsuka%2C+G">G. Mitsuka</a>, <a href="/search/hep-ex?searchtype=author&query=Muraki%2C+Y">Y. Muraki</a>, <a href="/search/hep-ex?searchtype=author&query=Noda%2C+K">K. Noda</a>, <a href="/search/hep-ex?searchtype=author&query=Papini%2C+P">P. Papini</a>, <a href="/search/hep-ex?searchtype=author&query=Perrot%2C+A+-">A. -L. Perrot</a>, <a href="/search/hep-ex?searchtype=author&query=Ricciarini%2C+S">S. Ricciarini</a>, <a href="/search/hep-ex?searchtype=author&query=Sako%2C+T">T. Sako</a>, <a href="/search/hep-ex?searchtype=author&query=Shimizu%2C+Y">Y. Shimizu</a>, <a href="/search/hep-ex?searchtype=author&query=Suzuki%2C+K">K. Suzuki</a>, <a href="/search/hep-ex?searchtype=author&query=Suzuki%2C+T">T. Suzuki</a>, <a href="/search/hep-ex?searchtype=author&query=Taki%2C+K">K. Taki</a> , et al. (4 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1205.4578v2-abstract-short" style="display: inline;"> The inclusive production rate of neutral pions in the rapidity range greater than $y=8.9$ has been measured by the Large Hadron Collider forward (LHCf) experiment during LHC $\sqrt{s}=7$\,TeV proton-proton collision operation in early 2010. This paper presents the transverse momentum spectra of the neutral pions. The spectra from two independent LHCf detectors are consistent with each other and se… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1205.4578v2-abstract-full').style.display = 'inline'; document.getElementById('1205.4578v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1205.4578v2-abstract-full" style="display: none;"> The inclusive production rate of neutral pions in the rapidity range greater than $y=8.9$ has been measured by the Large Hadron Collider forward (LHCf) experiment during LHC $\sqrt{s}=7$\,TeV proton-proton collision operation in early 2010. This paper presents the transverse momentum spectra of the neutral pions. The spectra from two independent LHCf detectors are consistent with each other and serve as a cross check of the data. The transverse momentum spectra are also compared with the predictions of several hadronic interaction models that are often used for high energy particle physics and for modeling ultra-high-energy cosmic-ray showers. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1205.4578v2-abstract-full').style.display = 'none'; document.getElementById('1205.4578v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 2 October, 2012; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 21 May, 2012; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2012. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">18 Pages, 10 figures, submitted to Phys. Rev. D</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1107.4882">arXiv:1107.4882</a> <span> [<a href="https://arxiv.org/pdf/1107.4882">pdf</a>, <a href="https://arxiv.org/ps/1107.4882">ps</a>, <a href="https://arxiv.org/format/1107.4882">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Astrophysical Phenomena">astro-ph.HE</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/2041-8205/736/1/L1">10.1088/2041-8205/736/1/L1 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The discovery of geomagnetically trapped cosmic ray antiprotons </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Adriani%2C+O">O. Adriani</a>, <a href="/search/hep-ex?searchtype=author&query=Barbarino%2C+G+C">G. C. Barbarino</a>, <a href="/search/hep-ex?searchtype=author&query=Bazilevskaya%2C+G+A">G. A. Bazilevskaya</a>, <a href="/search/hep-ex?searchtype=author&query=Bellotti%2C+R">R. Bellotti</a>, <a href="/search/hep-ex?searchtype=author&query=Boezio%2C+M">M. Boezio</a>, <a href="/search/hep-ex?searchtype=author&query=Bogomolov%2C+E+A">E. A. Bogomolov</a>, <a href="/search/hep-ex?searchtype=author&query=Bongi%2C+M">M. Bongi</a>, <a href="/search/hep-ex?searchtype=author&query=Bonvicini%2C+V">V. Bonvicini</a>, <a href="/search/hep-ex?searchtype=author&query=Borisov%2C+S">S. Borisov</a>, <a href="/search/hep-ex?searchtype=author&query=Bottai%2C+S">S. Bottai</a>, <a href="/search/hep-ex?searchtype=author&query=Bruno%2C+A">A. Bruno</a>, <a href="/search/hep-ex?searchtype=author&query=Cafagna%2C+F">F. Cafagna</a>, <a href="/search/hep-ex?searchtype=author&query=Campana%2C+D">D. Campana</a>, <a href="/search/hep-ex?searchtype=author&query=Carbone%2C+R">R. Carbone</a>, <a href="/search/hep-ex?searchtype=author&query=Carlson%2C+P">P. Carlson</a>, <a href="/search/hep-ex?searchtype=author&query=Casolino%2C+M">M. Casolino</a>, <a href="/search/hep-ex?searchtype=author&query=Castellini%2C+G">G. Castellini</a>, <a href="/search/hep-ex?searchtype=author&query=Consiglio%2C+L">L. Consiglio</a>, <a href="/search/hep-ex?searchtype=author&query=De+Pascale%2C+M+P">M. P. De Pascale</a>, <a href="/search/hep-ex?searchtype=author&query=De+Santis%2C+C">C. De Santis</a>, <a href="/search/hep-ex?searchtype=author&query=De+Simone%2C+N">N. De Simone</a>, <a href="/search/hep-ex?searchtype=author&query=Di+Felice%2C+V">V. Di Felice</a>, <a href="/search/hep-ex?searchtype=author&query=Galper%2C+A+M">A. M. Galper</a>, <a href="/search/hep-ex?searchtype=author&query=Gillard%2C+W">W. Gillard</a>, <a href="/search/hep-ex?searchtype=author&query=Grishantseva%2C+L">L. Grishantseva</a> , et al. (39 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1107.4882v1-abstract-short" style="display: inline;"> The existence of a significant flux of antiprotons confined to Earth's magnetosphere has been considered in several theoretical works. These antiparticles are produced in nuclear interactions of energetic cosmic rays with the terrestrial atmosphere and accumulate in the geomagnetic field at altitudes of several hundred kilometers. A contribution from the decay of albedo antineutrons has been hypot… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1107.4882v1-abstract-full').style.display = 'inline'; document.getElementById('1107.4882v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1107.4882v1-abstract-full" style="display: none;"> The existence of a significant flux of antiprotons confined to Earth's magnetosphere has been considered in several theoretical works. These antiparticles are produced in nuclear interactions of energetic cosmic rays with the terrestrial atmosphere and accumulate in the geomagnetic field at altitudes of several hundred kilometers. A contribution from the decay of albedo antineutrons has been hypothesized in analogy to proton production by neutron decay, which constitutes the main source of trapped protons at energies above some tens of MeV. This Letter reports the discovery of an antiproton radiation belt around the Earth. The trapped antiproton energy spectrum in the South Atlantic Anomaly (SAA) region has been measured by the PAMELA experiment for the kinetic energy range 60--750 MeV. A measurement of the atmospheric sub-cutoff antiproton spectrum outside the radiation belts is also reported. PAMELA data show that the magnetospheric antiproton flux in the SAA exceeds the cosmic-ray antiproton flux by three orders of magnitude at the present solar minimum, and exceeds the sub-cutoff antiproton flux outside radiation belts by four orders of magnitude, constituting the most abundant source of antiprotons near the Earth. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1107.4882v1-abstract-full').style.display = 'none'; document.getElementById('1107.4882v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 25 July, 2011; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2011. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Accepted for publication in ApJL</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> ApJ, 737, L29, 2011 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1107.4519">arXiv:1107.4519</a> <span> [<a href="https://arxiv.org/pdf/1107.4519">pdf</a>, <a href="https://arxiv.org/ps/1107.4519">ps</a>, <a href="https://arxiv.org/format/1107.4519">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Solar and Stellar Astrophysics">astro-ph.SR</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/0004-637X/742/2/102">10.1088/0004-637X/742/2/102 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Observations of the December 13 and 14, 2006, Solar Particle Events in the 80 MeV/n - 3 GeV/n range from space with PAMELA detector </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Adriani%2C+O">O. Adriani</a>, <a href="/search/hep-ex?searchtype=author&query=Barbarino%2C+G+C">G. C. Barbarino</a>, <a href="/search/hep-ex?searchtype=author&query=Bazilevskaya%2C+G+A">G. A. Bazilevskaya</a>, <a href="/search/hep-ex?searchtype=author&query=Bellotti%2C+R">R. Bellotti</a>, <a href="/search/hep-ex?searchtype=author&query=Boezio%2C+M">M. Boezio</a>, <a href="/search/hep-ex?searchtype=author&query=Bogomolov%2C+E+A">E. A. Bogomolov</a>, <a href="/search/hep-ex?searchtype=author&query=Bonechi%2C+L">L. Bonechi</a>, <a href="/search/hep-ex?searchtype=author&query=Bongi%2C+M">M. Bongi</a>, <a href="/search/hep-ex?searchtype=author&query=Bonvicini%2C+V">V. Bonvicini</a>, <a href="/search/hep-ex?searchtype=author&query=Borisov%2C+S">S. Borisov</a>, <a href="/search/hep-ex?searchtype=author&query=Bottai%2C+S">S. Bottai</a>, <a href="/search/hep-ex?searchtype=author&query=Bruno%2C+A">A. Bruno</a>, <a href="/search/hep-ex?searchtype=author&query=Cafagna%2C+F">F. Cafagna</a>, <a href="/search/hep-ex?searchtype=author&query=Campana%2C+D">D. Campana</a>, <a href="/search/hep-ex?searchtype=author&query=Carbone%2C+R">R. Carbone</a>, <a href="/search/hep-ex?searchtype=author&query=Carlson%2C+P">P. Carlson</a>, <a href="/search/hep-ex?searchtype=author&query=Casolino%2C+M">M. Casolino</a>, <a href="/search/hep-ex?searchtype=author&query=Castellini%2C+G">G. Castellini</a>, <a href="/search/hep-ex?searchtype=author&query=Consiglio%2C+L">L. Consiglio</a>, <a href="/search/hep-ex?searchtype=author&query=De+Pascale%2C+M+P">M. P. De Pascale</a>, <a href="/search/hep-ex?searchtype=author&query=De+Santis%2C+C">C. De Santis</a>, <a href="/search/hep-ex?searchtype=author&query=De+Simone%2C+N">N. De Simone</a>, <a href="/search/hep-ex?searchtype=author&query=Di+Felice%2C+V">V. Di Felice</a>, <a href="/search/hep-ex?searchtype=author&query=Galper%2C+A+M">A. M. Galper</a>, <a href="/search/hep-ex?searchtype=author&query=Grishantseva%2C+L">L. Grishantseva</a> , et al. (39 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1107.4519v1-abstract-short" style="display: inline;"> We present the space spectrometer PAMELA observations of proton and helium fluxes during the December 13 and 14, 2006 solar particle events. This is the first direct measurement of the solar energetic particles in space with a single instrument in the energy range from $\sim$ 80 MeV/n up to $\sim$ 3 GeV/n. In the event of December 13 measured energy spectra of solar protons and helium were compare… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1107.4519v1-abstract-full').style.display = 'inline'; document.getElementById('1107.4519v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1107.4519v1-abstract-full" style="display: none;"> We present the space spectrometer PAMELA observations of proton and helium fluxes during the December 13 and 14, 2006 solar particle events. This is the first direct measurement of the solar energetic particles in space with a single instrument in the energy range from $\sim$ 80 MeV/n up to $\sim$ 3 GeV/n. In the event of December 13 measured energy spectra of solar protons and helium were compared with results obtained by neutron monitors and other detectors. Our measurements show a spectral behaviour different from those derived from the neutron monitor network. No satisfactory analytical fitting was found for the energy spectra. During the first hours of the December 13 event solar energetic particles spectra were close to the exponential form demonstrating rather significant temporal evolution. Solar He with energy up to ~1 GeV/n was recorded on December 13. In the event of December 14 energy of solar protons reached ~600 MeV whereas maximum energy of He was below 100 MeV/n. The spectra were slightly bended in the lower energy range and preserved their form during the second event. Difference in the particle flux appearance and temporal evolution in these two events may argue for a special conditions leading to acceleration of solar particles up to relativistic energies. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1107.4519v1-abstract-full').style.display = 'none'; document.getElementById('1107.4519v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 22 July, 2011; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2011. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Accepted for publication on Astrophysical journal</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1104.5294">arXiv:1104.5294</a> <span> [<a href="https://arxiv.org/pdf/1104.5294">pdf</a>, <a href="https://arxiv.org/ps/1104.5294">ps</a>, <a href="https://arxiv.org/format/1104.5294">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.physletb.2011.07.077">10.1016/j.physletb.2011.07.077 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of zero degree single photon energy spectra for sqrt(s) = 7TeV proton-proton collisions at LHC </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Adriani%2C+O">O. Adriani</a>, <a href="/search/hep-ex?searchtype=author&query=Bonechi%2C+L">L. Bonechi</a>, <a href="/search/hep-ex?searchtype=author&query=Bongi%2C+M">M. Bongi</a>, <a href="/search/hep-ex?searchtype=author&query=Castellini%2C+G">G. Castellini</a>, <a href="/search/hep-ex?searchtype=author&query=D%27Alessandro%2C+R">R. D'Alessandro</a>, <a href="/search/hep-ex?searchtype=author&query=Faus%2C+A">A. Faus</a>, <a href="/search/hep-ex?searchtype=author&query=Fukatsu%2C+K">K. Fukatsu</a>, <a href="/search/hep-ex?searchtype=author&query=Haguenauer%2C+M">M. Haguenauer</a>, <a href="/search/hep-ex?searchtype=author&query=Itow%2C+Y">Y. Itow</a>, <a href="/search/hep-ex?searchtype=author&query=Kasahara%2C+K">K. Kasahara</a>, <a href="/search/hep-ex?searchtype=author&query=Kawade%2C+K">K. Kawade</a>, <a href="/search/hep-ex?searchtype=author&query=Macina%2C+D">D. Macina</a>, <a href="/search/hep-ex?searchtype=author&query=Mase%2C+T">T. Mase</a>, <a href="/search/hep-ex?searchtype=author&query=Masuda%2C+K">K. Masuda</a>, <a href="/search/hep-ex?searchtype=author&query=Matsubara%2C+Y">Y. Matsubara</a>, <a href="/search/hep-ex?searchtype=author&query=Menjo%2C+H">H. Menjo</a>, <a href="/search/hep-ex?searchtype=author&query=Mitsuka%2C+G">G. Mitsuka</a>, <a href="/search/hep-ex?searchtype=author&query=Muraki%2C+Y">Y. Muraki</a>, <a href="/search/hep-ex?searchtype=author&query=Nakai%2C+M">M. Nakai</a>, <a href="/search/hep-ex?searchtype=author&query=Noda%2C+K">K. Noda</a>, <a href="/search/hep-ex?searchtype=author&query=Papini%2C+P">P. Papini</a>, <a href="/search/hep-ex?searchtype=author&query=Perrot%2C+A+-">A. -L. Perrot</a>, <a href="/search/hep-ex?searchtype=author&query=Ricciarini%2C+S">S. Ricciarini</a>, <a href="/search/hep-ex?searchtype=author&query=Sako%2C+T">T. Sako</a>, <a href="/search/hep-ex?searchtype=author&query=Shimizu%2C+Y">Y. Shimizu</a> , et al. (10 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1104.5294v2-abstract-short" style="display: inline;"> In early 2010, the Large Hadron Collider forward (LHCf) experiment measured very forward neutral particle spectra in LHC proton-proton collisions. From a limited data set taken under the best beam conditions (low beam-gas background and low occurance of pile-up events), the single photon spectra at sqrt(s)=7TeV and pseudo-rapidity (eta) ranges from 8.81 to 8.99 and from 10.94 to infinity were obta… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1104.5294v2-abstract-full').style.display = 'inline'; document.getElementById('1104.5294v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1104.5294v2-abstract-full" style="display: none;"> In early 2010, the Large Hadron Collider forward (LHCf) experiment measured very forward neutral particle spectra in LHC proton-proton collisions. From a limited data set taken under the best beam conditions (low beam-gas background and low occurance of pile-up events), the single photon spectra at sqrt(s)=7TeV and pseudo-rapidity (eta) ranges from 8.81 to 8.99 and from 10.94 to infinity were obtained for the first time and are reported in this paper. The spectra from two independent LHCf detectors are consistent with one another and serve as a cross check of the data. The photon spectra are also compared with the predictions of several hadron interaction models that are used extensively for modeling ultra high energy cosmic ray showers. Despite conservative estimates for the systematic errors, none of the models agree perfectly with the measurements. A notable difference is found between the data and the DPMJET 3.04 and PYTHIA 8.145 hadron interaction models above 2TeV where the models predict higher photon yield than the data. The QGSJET II-03 model predicts overall lower photon yield than the data, especially above 2TeV in the rapidity range 8.81<eta<8.99. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1104.5294v2-abstract-full').style.display = 'none'; document.getElementById('1104.5294v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 8 June, 2011; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 28 April, 2011; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2011. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> CERN-PH-EP-2011-061 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys.Lett.B703:128-134,2011 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1012.1490">arXiv:1012.1490</a> <span> [<a href="https://arxiv.org/pdf/1012.1490">pdf</a>, <a href="https://arxiv.org/ps/1012.1490">ps</a>, <a href="https://arxiv.org/format/1012.1490">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.nuclphysbps.2011.03.037">10.1016/j.nuclphysbps.2011.03.037 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Early results of the LHCf Experiment and their contribution to Ultra-High-Energy Cosmic Ray Physics </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Adriani%2C+O">O. Adriani</a>, <a href="/search/hep-ex?searchtype=author&query=Bonechi%2C+L">L. Bonechi</a>, <a href="/search/hep-ex?searchtype=author&query=Bongi%2C+M">M. Bongi</a>, <a href="/search/hep-ex?searchtype=author&query=Castellini%2C+G">G. Castellini</a>, <a href="/search/hep-ex?searchtype=author&query=D%27Alessandro%2C+R">R. D'Alessandro</a>, <a href="/search/hep-ex?searchtype=author&query=Faus%2C+A">A. Faus</a>, <a href="/search/hep-ex?searchtype=author&query=Fukatsu%2C+K">K. Fukatsu</a>, <a href="/search/hep-ex?searchtype=author&query=Haguenauer%2C+M">M. Haguenauer</a>, <a href="/search/hep-ex?searchtype=author&query=Itow%2C+Y">Y. Itow</a>, <a href="/search/hep-ex?searchtype=author&query=Kasahara%2C+K">K. Kasahara</a>, <a href="/search/hep-ex?searchtype=author&query=Macina%2C+D">D. Macina</a>, <a href="/search/hep-ex?searchtype=author&query=Mase%2C+T">T. Mase</a>, <a href="/search/hep-ex?searchtype=author&query=Masuda%2C+K">K. Masuda</a>, <a href="/search/hep-ex?searchtype=author&query=Matsubara%2C+Y">Y. Matsubara</a>, <a href="/search/hep-ex?searchtype=author&query=Menjo%2C+H">H. Menjo</a>, <a href="/search/hep-ex?searchtype=author&query=Mitsuka%2C+G">G. Mitsuka</a>, <a href="/search/hep-ex?searchtype=author&query=Muraki%2C+Y">Y. Muraki</a>, <a href="/search/hep-ex?searchtype=author&query=Nakai%2C+M">M. Nakai</a>, <a href="/search/hep-ex?searchtype=author&query=Noda%2C+K">K. Noda</a>, <a href="/search/hep-ex?searchtype=author&query=Papini%2C+P">P. Papini</a>, <a href="/search/hep-ex?searchtype=author&query=Perrot%2C+A+L">A L. Perrot</a>, <a href="/search/hep-ex?searchtype=author&query=Ricciarini%2C+S">S. Ricciarini</a>, <a href="/search/hep-ex?searchtype=author&query=Sako%2C+T">T. Sako</a>, <a href="/search/hep-ex?searchtype=author&query=Suzuki%2C+K">K. Suzuki</a>, <a href="/search/hep-ex?searchtype=author&query=Suzuki%2C+T">T. Suzuki</a> , et al. (8 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1012.1490v1-abstract-short" style="display: inline;"> LHCf is an experiment dedicated to the measurement of neutral particles emitted in the very forward region of LHC collisions. The physics goal is to provide data for calibrating hadron interaction models that are used in the study of Extremely High-Energy Cosmic-Rays. The LHCf experiment acquired data from April to July 2010 during commissioning time of LHC operations at low luminosity. Production… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1012.1490v1-abstract-full').style.display = 'inline'; document.getElementById('1012.1490v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1012.1490v1-abstract-full" style="display: none;"> LHCf is an experiment dedicated to the measurement of neutral particles emitted in the very forward region of LHC collisions. The physics goal is to provide data for calibrating hadron interaction models that are used in the study of Extremely High-Energy Cosmic-Rays. The LHCf experiment acquired data from April to July 2010 during commissioning time of LHC operations at low luminosity. Production spectra of photons and neutrons emitted in the very forward region ($畏>$ 8.4) have been obtained. In this paper preliminary results of the photon spectra taken at $\sqrt{s}$ = 7TeV are reported. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1012.1490v1-abstract-full').style.display = 'none'; document.getElementById('1012.1490v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 7 December, 2010; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2010. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">This paper has been presented in the international conference CRIS 2010 for 100 years of cosmic ray physics: from pioneering experiments to physics in space. The paper will be published in Nuclear Physics B (conference proceedings)</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nucl.Phys.Proc.Suppl.212-213:270-276,2011 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/0810.4994">arXiv:0810.4994</a> <span> [<a href="https://arxiv.org/pdf/0810.4994">pdf</a>, <a href="https://arxiv.org/ps/0810.4994">ps</a>, <a href="https://arxiv.org/format/0810.4994">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Astrophysics">astro-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.102.051101">10.1103/PhysRevLett.102.051101 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> A new measurement of the antiproton-to-proton flux ratio up to 100 GeV in the cosmic radiation </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Adriani%2C+O">O. Adriani</a>, <a href="/search/hep-ex?searchtype=author&query=Barbarino%2C+G+C">G. C. Barbarino</a>, <a href="/search/hep-ex?searchtype=author&query=Bazilevskaya%2C+G+A">G. A. Bazilevskaya</a>, <a href="/search/hep-ex?searchtype=author&query=Bellotti%2C+R">R. Bellotti</a>, <a href="/search/hep-ex?searchtype=author&query=Boezio%2C+M">M. Boezio</a>, <a href="/search/hep-ex?searchtype=author&query=Bogomolov%2C+E+A">E. A. Bogomolov</a>, <a href="/search/hep-ex?searchtype=author&query=Bonechi%2C+L">L. Bonechi</a>, <a href="/search/hep-ex?searchtype=author&query=Bongi%2C+M">M. Bongi</a>, <a href="/search/hep-ex?searchtype=author&query=Bonvicini%2C+V">V. Bonvicini</a>, <a href="/search/hep-ex?searchtype=author&query=Bottai%2C+S">S. Bottai</a>, <a href="/search/hep-ex?searchtype=author&query=Bruno%2C+A">A. Bruno</a>, <a href="/search/hep-ex?searchtype=author&query=Cafagna%2C+F">F. Cafagna</a>, <a href="/search/hep-ex?searchtype=author&query=Campana%2C+D">D. Campana</a>, <a href="/search/hep-ex?searchtype=author&query=Carlson%2C+P">P. Carlson</a>, <a href="/search/hep-ex?searchtype=author&query=Casolino%2C+M">M. Casolino</a>, <a href="/search/hep-ex?searchtype=author&query=Castellini%2C+G">G. Castellini</a>, <a href="/search/hep-ex?searchtype=author&query=De+Pascale%2C+M+P">M. P. De Pascale</a>, <a href="/search/hep-ex?searchtype=author&query=De+Rosa%2C+G">G. De Rosa</a>, <a href="/search/hep-ex?searchtype=author&query=Fedele%2C+D">D. Fedele</a>, <a href="/search/hep-ex?searchtype=author&query=Galper%2C+A+M">A. M. Galper</a>, <a href="/search/hep-ex?searchtype=author&query=Grishantseva%2C+L">L. Grishantseva</a>, <a href="/search/hep-ex?searchtype=author&query=Hofverberg%2C+P">P. Hofverberg</a>, <a href="/search/hep-ex?searchtype=author&query=Koldashov%2C+S+V">S. V. Koldashov</a>, <a href="/search/hep-ex?searchtype=author&query=Krutkov%2C+S+Y">S. Y. Krutkov</a>, <a href="/search/hep-ex?searchtype=author&query=Kvashnin%2C+A+N">A. N. Kvashnin</a> , et al. (28 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="0810.4994v2-abstract-short" style="display: inline;"> A new measurement of the cosmic ray antiproton-to-proton flux ratio between 1 and 100 GeV is presented. The results were obtained with the PAMELA experiment, which was launched into low-earth orbit on-board the Resurs-DK1 satellite on June 15th 2006. During 500 days of data collection a total of about 1000 antiprotons have been identified, including 100 above an energy of 20 GeV. The high-energy… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0810.4994v2-abstract-full').style.display = 'inline'; document.getElementById('0810.4994v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="0810.4994v2-abstract-full" style="display: none;"> A new measurement of the cosmic ray antiproton-to-proton flux ratio between 1 and 100 GeV is presented. The results were obtained with the PAMELA experiment, which was launched into low-earth orbit on-board the Resurs-DK1 satellite on June 15th 2006. During 500 days of data collection a total of about 1000 antiprotons have been identified, including 100 above an energy of 20 GeV. The high-energy results are a ten-fold improvement in statistics with respect to all previously published data. The data follow the trend expected from secondary production calculations and significantly constrain contributions from exotic sources, e.g. dark matter particle annihilations. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0810.4994v2-abstract-full').style.display = 'none'; document.getElementById('0810.4994v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 25 February, 2009; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 28 October, 2008; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2008. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">10 pages, 4 figures, 1 table</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys.Rev.Lett.102:051101,2009 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/0810.3508">arXiv:0810.3508</a> <span> [<a href="https://arxiv.org/pdf/0810.3508">pdf</a>, <a href="https://arxiv.org/ps/0810.3508">ps</a>, <a href="https://arxiv.org/format/0810.3508">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Astrophysics">astro-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> </div> <p class="title is-5 mathjax"> First Results from the PAMELA Space Mission </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Boezio%2C+M">M. Boezio</a>, <a href="/search/hep-ex?searchtype=author&query=Bonvicini%2C+V">V. Bonvicini</a>, <a href="/search/hep-ex?searchtype=author&query=Jerse%2C+G">G. Jerse</a>, <a href="/search/hep-ex?searchtype=author&query=Mocchiutti%2C+E">E. Mocchiutti</a>, <a href="/search/hep-ex?searchtype=author&query=Vacchi%2C+A">A. Vacchi</a>, <a href="/search/hep-ex?searchtype=author&query=Zampa%2C+G">G. Zampa</a>, <a href="/search/hep-ex?searchtype=author&query=Zampa%2C+N">N. Zampa</a>, <a href="/search/hep-ex?searchtype=author&query=Adriani%2C+O">O. Adriani</a>, <a href="/search/hep-ex?searchtype=author&query=Bongi%2C+M">M. Bongi</a>, <a href="/search/hep-ex?searchtype=author&query=Bonechi%2C+L">L. Bonechi</a>, <a href="/search/hep-ex?searchtype=author&query=Bottai%2C+S">S. Bottai</a>, <a href="/search/hep-ex?searchtype=author&query=Fedele%2C+D">D. Fedele</a>, <a href="/search/hep-ex?searchtype=author&query=Papini%2C+P">P. Papini</a>, <a href="/search/hep-ex?searchtype=author&query=Ricciarini%2C+S+B">S. B. Ricciarini</a>, <a href="/search/hep-ex?searchtype=author&query=Spillantini%2C+P">P. Spillantini</a>, <a href="/search/hep-ex?searchtype=author&query=Taddei%2C+E">E. Taddei</a>, <a href="/search/hep-ex?searchtype=author&query=Vannuccini%2C+E">E. Vannuccini</a>, <a href="/search/hep-ex?searchtype=author&query=Barbarino%2C+G+C">G. C. Barbarino</a>, <a href="/search/hep-ex?searchtype=author&query=Campana%2C+D">D. Campana</a>, <a href="/search/hep-ex?searchtype=author&query=Carbone%2C+R">R. Carbone</a>, <a href="/search/hep-ex?searchtype=author&query=Osteria%2C+G">G. Osteria</a>, <a href="/search/hep-ex?searchtype=author&query=Bazilevskaya%2C+G+A">G. A. Bazilevskaya</a>, <a href="/search/hep-ex?searchtype=author&query=Kvashnin%2C+A+N">A. N. Kvashnin</a>, <a href="/search/hep-ex?searchtype=author&query=Stozhkov%2C+Y+I">Y. I. Stozhkov</a>, <a href="/search/hep-ex?searchtype=author&query=Bellotti%2C+R">R. Bellotti</a> , et al. (31 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="0810.3508v1-abstract-short" style="display: inline;"> On the 15th of June 2006, the PAMELA satellite-borne experiment was launched from the Baikonur cosmodrome and it has been collecting data since July 2006. The apparatus comprises a time-of-flight system, a silicon-microstrip magnetic spectrometer, a silicon-tungsten electromagnetic calorimeter, an anticoincidence system, a shower tail counter scintillator and a neutron detector. The combination… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0810.3508v1-abstract-full').style.display = 'inline'; document.getElementById('0810.3508v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="0810.3508v1-abstract-full" style="display: none;"> On the 15th of June 2006, the PAMELA satellite-borne experiment was launched from the Baikonur cosmodrome and it has been collecting data since July 2006. The apparatus comprises a time-of-flight system, a silicon-microstrip magnetic spectrometer, a silicon-tungsten electromagnetic calorimeter, an anticoincidence system, a shower tail counter scintillator and a neutron detector. The combination of these devices allows precision studies of the charged cosmic radiation to be conducted over a wide energy range (100 MeV - 100's GeV) with high statistics. The primary scientific goal is the measurement of the antiproton and positron energy spectrum in order to search for exotic sources, such as dark matter particle annihilations. PAMELA is also searching for primordial antinuclei (anti-helium), and testing cosmic-ray propagation models through precise measurements of the antiparticle energy spectrum and precision studies of light nuclei and their isotopes. We review the status of the apparatus and present preliminary results concerning antiparticle measurements and dark-matter indirect searches. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0810.3508v1-abstract-full').style.display = 'none'; document.getElementById('0810.3508v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 20 October, 2008; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2008. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Parallel talk at ICHEP08, Philadelphia, USA, July 2008. 5 pages, LaTeX, 3 eps figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/hep-ex/0510012">arXiv:hep-ex/0510012</a> <span> [<a href="https://arxiv.org/pdf/hep-ex/0510012">pdf</a>, <a href="https://arxiv.org/ps/hep-ex/0510012">ps</a>, <a href="https://arxiv.org/format/hep-ex/0510012">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.nima.2005.10.014">10.1016/j.nima.2005.10.014 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Spatial Resolution of Double-Sided Silicon Microstrip Detectors for the PAMELA Apparatus </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Straulino%2C+S">S. Straulino</a>, <a href="/search/hep-ex?searchtype=author&query=Adriani%2C+O">O. Adriani</a>, <a href="/search/hep-ex?searchtype=author&query=Bonechi%2C+L">L. Bonechi</a>, <a href="/search/hep-ex?searchtype=author&query=Bongi%2C+M">M. Bongi</a>, <a href="/search/hep-ex?searchtype=author&query=Bottai%2C+S">S. Bottai</a>, <a href="/search/hep-ex?searchtype=author&query=Castellini%2C+G">G. Castellini</a>, <a href="/search/hep-ex?searchtype=author&query=Fedele%2C+D">D. Fedele</a>, <a href="/search/hep-ex?searchtype=author&query=Grandi%2C+M">M. Grandi</a>, <a href="/search/hep-ex?searchtype=author&query=Papini%2C+P">P. Papini</a>, <a href="/search/hep-ex?searchtype=author&query=Ricciarini%2C+S+B">S. B. Ricciarini</a>, <a href="/search/hep-ex?searchtype=author&query=Spillantini%2C+P">P. Spillantini</a>, <a href="/search/hep-ex?searchtype=author&query=Taccetti%2C+F">F. Taccetti</a>, <a href="/search/hep-ex?searchtype=author&query=Taddei%2C+E">E. Taddei</a>, <a href="/search/hep-ex?searchtype=author&query=Vannuccini%2C+E">E. Vannuccini</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="hep-ex/0510012v1-abstract-short" style="display: inline;"> The PAMELA apparatus has been assembled and it is ready to be launched in a satellite mission to study mainly the antiparticle component of cosmic rays. In this paper the performances obtained for the silicon microstrip detectors used in the magnetic spectrometer are presented. This subdetector reconstructs the curvature of a charged particle in the magnetic field produced by a permanent magnet… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('hep-ex/0510012v1-abstract-full').style.display = 'inline'; document.getElementById('hep-ex/0510012v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="hep-ex/0510012v1-abstract-full" style="display: none;"> The PAMELA apparatus has been assembled and it is ready to be launched in a satellite mission to study mainly the antiparticle component of cosmic rays. In this paper the performances obtained for the silicon microstrip detectors used in the magnetic spectrometer are presented. This subdetector reconstructs the curvature of a charged particle in the magnetic field produced by a permanent magnet and consequently determines momentum and charge sign, thanks to a very good accuracy in the position measurements (better than 3 um in the bending coordinate). A complete simulation of the silicon microstrip detectors has been developed in order to investigate in great detail the sensor's characteristics. Simulated events have been then compared with data gathered from minimum ionizing particle (MIP) beams during the last years in order to tune free parameters of the simulation. Finally some either widely used or original position finding algorithms, designed for such kind of detectors, have been applied to events with different incidence angles. As a result of the analysis, a method of impact point reconstruction can be chosen, depending on both the particle's incidence angle and the cluster multiplicity, so as to maximize the capability of the spectrometer in antiparticle tagging. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('hep-ex/0510012v1-abstract-full').style.display = 'none'; document.getElementById('hep-ex/0510012v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 4 October, 2005; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2005. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">28 pages, 18 figures, submitted to Nuclear Instruments and Methods in Physics Research A</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nucl.Instrum.Meth. A556 (2006) 100-114 </p> </li> </ol> <div class="is-hidden-tablet">  <span class="help" style="display: inline-block;"><a href="https://github.com/arXiv/arxiv-search/releases">Search v0.5.6 released 2020-02-24</a>  </span> </div> </div> </main> <footer> <div class="columns is-desktop" role="navigation" aria-label="Secondary">  <div class="column"> <div class="columns"> <div class="column"> <ul class="nav-spaced"> <li><a href="https://info.arxiv.org/about">About</a></li> <li><a href="https://info.arxiv.org/help">Help</a></li> </ul> </div> <div class="column"> <ul class="nav-spaced"> <li> <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" class="icon filter-black" role="presentation"><title>contact arXiv</title><desc>Click here to contact arXiv</desc><path d="M502.3 190.8c3.9-3.1 9.7-.2 9.7 4.7V400c0 26.5-21.5 48-48 48H48c-26.5 0-48-21.5-48-48V195.6c0-5 5.7-7.8 9.7-4.7 22.4 17.4 52.1 39.5 154.1 113.6 21.1 15.4 56.7 47.8 92.2 47.6 35.7.3 72-32.8 92.3-47.6 102-74.1 131.6-96.3 154-113.7zM256 320c23.2.4 56.6-29.2 73.4-41.4 132.7-96.3 142.8-104.7 173.4-128.7 5.8-4.5 9.2-11.5 9.2-18.9v-19c0-26.5-21.5-48-48-48H48C21.5 64 0 85.5 0 112v19c0 7.4 3.4 14.3 9.2 18.9 30.6 23.9 40.7 32.4 173.4 128.7 16.8 12.2 50.2 41.8 73.4 41.4z"/></svg> <a href="https://info.arxiv.org/help/contact.html"> Contact</a> </li> <li> <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" class="icon filter-black" role="presentation"><title>subscribe to arXiv mailings</title><desc>Click here to subscribe</desc><path d="M476 3.2L12.5 270.6c-18.1 10.4-15.8 35.6 2.2 43.2L121 358.4l287.3-253.2c5.5-4.9 13.3 2.6 8.6 8.3L176 407v80.5c0 23.6 28.5 32.9 42.5 15.8L282 426l124.6 52.2c14.2 6 30.4-2.9 33-18.2l72-432C515 7.8 493.3-6.8 476 3.2z"/></svg> <a href="https://info.arxiv.org/help/subscribe"> Subscribe</a> </li> </ul> </div> </div> </div>   <div class="column"> <div class="columns"> <div class="column"> <ul class="nav-spaced"> <li><a href="https://info.arxiv.org/help/license/index.html">Copyright</a></li> <li><a href="https://info.arxiv.org/help/policies/privacy_policy.html">Privacy Policy</a></li> </ul> </div> <div class="column sorry-app-links"> <ul class="nav-spaced"> <li><a href="https://info.arxiv.org/help/web_accessibility.html">Web Accessibility Assistance</a></li> <li> <p class="help"> <a class="a11y-main-link" href="https://status.arxiv.org" target="_blank">arXiv Operational Status <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 256 512" class="icon filter-dark_grey" role="presentation"><path d="M224.3 273l-136 136c-9.4 9.4-24.6 9.4-33.9 0l-22.6-22.6c-9.4-9.4-9.4-24.6 0-33.9l96.4-96.4-96.4-96.4c-9.4-9.4-9.4-24.6 0-33.9L54.3 103c9.4-9.4 24.6-9.4 33.9 0l136 136c9.5 9.4 9.5 24.6.1 34z"/></svg></a><br> Get status notifications via <a class="is-link" href="https://subscribe.sorryapp.com/24846f03/email/new" target="_blank"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" class="icon filter-black" role="presentation"><path d="M502.3 190.8c3.9-3.1 9.7-.2 9.7 4.7V400c0 26.5-21.5 48-48 48H48c-26.5 0-48-21.5-48-48V195.6c0-5 5.7-7.8 9.7-4.7 22.4 17.4 52.1 39.5 154.1 113.6 21.1 15.4 56.7 47.8 92.2 47.6 35.7.3 72-32.8 92.3-47.6 102-74.1 131.6-96.3 154-113.7zM256 320c23.2.4 56.6-29.2 73.4-41.4 132.7-96.3 142.8-104.7 173.4-128.7 5.8-4.5 9.2-11.5 9.2-18.9v-19c0-26.5-21.5-48-48-48H48C21.5 64 0 85.5 0 112v19c0 7.4 3.4 14.3 9.2 18.9 30.6 23.9 40.7 32.4 173.4 128.7 16.8 12.2 50.2 41.8 73.4 41.4z"/></svg>email</a> or <a class="is-link" href="https://subscribe.sorryapp.com/24846f03/slack/new" target="_blank"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 448 512" class="icon filter-black" role="presentation"><path d="M94.12 315.1c0 25.9-21.16 47.06-47.06 47.06S0 341 0 315.1c0-25.9 21.16-47.06 47.06-47.06h47.06v47.06zm23.72 0c0-25.9 21.16-47.06 47.06-47.06s47.06 21.16 47.06 47.06v117.84c0 25.9-21.16 47.06-47.06 47.06s-47.06-21.16-47.06-47.06V315.1zm47.06-188.98c-25.9 0-47.06-21.16-47.06-47.06S139 32 164.9 32s47.06 21.16 47.06 47.06v47.06H164.9zm0 23.72c25.9 0 47.06 21.16 47.06 47.06s-21.16 47.06-47.06 47.06H47.06C21.16 243.96 0 222.8 0 196.9s21.16-47.06 47.06-47.06H164.9zm188.98 47.06c0-25.9 21.16-47.06 47.06-47.06 25.9 0 47.06 21.16 47.06 47.06s-21.16 47.06-47.06 47.06h-47.06V196.9zm-23.72 0c0 25.9-21.16 47.06-47.06 47.06-25.9 0-47.06-21.16-47.06-47.06V79.06c0-25.9 21.16-47.06 47.06-47.06 25.9 0 47.06 21.16 47.06 47.06V196.9zM283.1 385.88c25.9 0 47.06 21.16 47.06 47.06 0 25.9-21.16 47.06-47.06 47.06-25.9 0-47.06-21.16-47.06-47.06v-47.06h47.06zm0-23.72c-25.9 0-47.06-21.16-47.06-47.06 0-25.9 21.16-47.06 47.06-47.06h117.84c25.9 0 47.06 21.16 47.06 47.06 0 25.9-21.16 47.06-47.06 47.06H283.1z"/></svg>slack</a> </p> </li> </ul> </div> </div> </div>  </div> </footer> <script src="https://static.arxiv.org/static/base/1.0.0a5/js/member_acknowledgement.js"></script> </body> </html>

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