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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/2211.12377">arXiv:2211.12377</a> <span> [<a href="https://arxiv.org/pdf/2211.12377">pdf</a>, <a href="https://arxiv.org/format/2211.12377">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> <p class="title is-5 mathjax"> Direct tests of T, CP, CPT symmetries in transitions of neutral K mesons with the KLOE experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Babusci%2C+D">D. Babusci</a>, <a href="/search/hep-ex?searchtype=author&query=Ber%C5%82owski%2C+M">M. Ber艂owski</a>, <a href="/search/hep-ex?searchtype=author&query=Bloise%2C+C">C. Bloise</a>, <a href="/search/hep-ex?searchtype=author&query=Bossi%2C+F">F. Bossi</a>, <a href="/search/hep-ex?searchtype=author&query=Branchini%2C+P">P. Branchini</a>, <a href="/search/hep-ex?searchtype=author&query=Cao%2C+B">B. Cao</a>, <a href="/search/hep-ex?searchtype=author&query=Ceradini%2C+F">F. Ceradini</a>, <a href="/search/hep-ex?searchtype=author&query=Ciambrone%2C+P">P. Ciambrone</a>, <a href="/search/hep-ex?searchtype=author&query=Curciarello%2C+F">F. Curciarello</a>, <a href="/search/hep-ex?searchtype=author&query=Czerwi%C5%84ski%2C+E">E. Czerwi艅ski</a>, <a href="/search/hep-ex?searchtype=author&query=D%27Agostini%2C+G">G. D'Agostini</a>, <a href="/search/hep-ex?searchtype=author&query=D%27Amico%2C+R">R. D'Amico</a>, <a href="/search/hep-ex?searchtype=author&query=Dan%C3%A8%2C+E">E. Dan猫</a>, <a href="/search/hep-ex?searchtype=author&query=De+Leo%2C+V">V. De Leo</a>, <a href="/search/hep-ex?searchtype=author&query=De+Lucia%2C+E">E. De Lucia</a>, <a href="/search/hep-ex?searchtype=author&query=De+Santis%2C+A">A. De Santis</a>, <a href="/search/hep-ex?searchtype=author&query=De+Simone%2C+P">P. De Simone</a>, <a href="/search/hep-ex?searchtype=author&query=Di+Domenico%2C+A">A. Di Domenico</a>, <a href="/search/hep-ex?searchtype=author&query=Diociaiuti%2C+E">E. Diociaiuti</a>, <a href="/search/hep-ex?searchtype=author&query=Domenici%2C+D">D. Domenici</a>, <a href="/search/hep-ex?searchtype=author&query=D%27Uffizi%2C+A">A. D'Uffizi</a>, <a href="/search/hep-ex?searchtype=author&query=Fantini%2C+G">G. Fantini</a>, <a href="/search/hep-ex?searchtype=author&query=Gajos%2C+A">A. Gajos</a>, <a href="/search/hep-ex?searchtype=author&query=Gamrat%2C+S">S. Gamrat</a>, <a href="/search/hep-ex?searchtype=author&query=Gauzzi%2C+P">P. Gauzzi</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="2211.12377v3-abstract-short" style="display: inline;"> Tests of the T, CP and CPT symmetries in the neutral kaon system are performed by the direct comparison of the probabilities of a kaon transition process to its symmetry-conjugate. The exchange of in and out states required for a genuine test involving an anti-unitary transformation implied by time-reversal is implemented exploiting the entanglement of $K^0\bar{K}{}^0$ pairs produced at a $蠁$-fact… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2211.12377v3-abstract-full').style.display = 'inline'; document.getElementById('2211.12377v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2211.12377v3-abstract-full" style="display: none;"> Tests of the T, CP and CPT symmetries in the neutral kaon system are performed by the direct comparison of the probabilities of a kaon transition process to its symmetry-conjugate. The exchange of in and out states required for a genuine test involving an anti-unitary transformation implied by time-reversal is implemented exploiting the entanglement of $K^0\bar{K}{}^0$ pairs produced at a $蠁$-factory. A data sample collected by the KLOE experiment at DA$桅$NE corresponding to an integrated luminosity of about 1.7 fb$^{-1}$ is analysed to study the $螖$t distributions of the $蠁\to K_{S}K_{L}\to 蟺^+蟺^- \: 蟺^{\pm}e^{\mp}谓$ and $蠁\to K_{S}K_{L}\to 蟺^{\pm}e^{\mp}谓\: 3蟺^0$ processes, with $螖$t the difference of the kaon decay times. A comparison of the measured $螖$t distributions in the asymptotic region $螖t \gg 蟿_{S}$ allows to test for the first time T and CPT symmetries in kaon transitions with a precision of few percent, and to observe CP violation with this novel method. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2211.12377v3-abstract-full').style.display = 'none'; document.getElementById('2211.12377v3-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> 19 December, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 22 November, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 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">26 pages, 10 figures. Minor style corrections applied before journal submission. Sumbmitted to Physics Letters B</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2208.04872">arXiv:2208.04872</a> <span> [<a href="https://arxiv.org/pdf/2208.04872">pdf</a>, <a href="https://arxiv.org/format/2208.04872">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> <p class="title is-5 mathjax"> Measurement of the $K_S \to 蟺e 谓$ branching fraction with the KLOE experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Babusci%2C+D">D. Babusci</a>, <a href="/search/hep-ex?searchtype=author&query=Berlowski%2C+M">M. Berlowski</a>, <a href="/search/hep-ex?searchtype=author&query=Bloise%2C+C">C. Bloise</a>, <a href="/search/hep-ex?searchtype=author&query=Bossi%2C+F">F. Bossi</a>, <a href="/search/hep-ex?searchtype=author&query=Branchini%2C+P">P. Branchini</a>, <a href="/search/hep-ex?searchtype=author&query=Cao%2C+B">B. Cao</a>, <a href="/search/hep-ex?searchtype=author&query=Ceradini%2C+F">F. Ceradini</a>, <a href="/search/hep-ex?searchtype=author&query=Ciambrone%2C+P">P. Ciambrone</a>, <a href="/search/hep-ex?searchtype=author&query=Curciarello%2C+F">F. Curciarello</a>, <a href="/search/hep-ex?searchtype=author&query=Czerwi%C5%84ski%2C+E">E. Czerwi艅ski</a>, <a href="/search/hep-ex?searchtype=author&query=D%27Agostini%2C+G">G. D'Agostini</a>, <a href="/search/hep-ex?searchtype=author&query=D%27Amico%2C+R">R. D'Amico</a>, <a href="/search/hep-ex?searchtype=author&query=Dan%C3%A8%2C+E">E. Dan猫</a>, <a href="/search/hep-ex?searchtype=author&query=De+Leo%2C+V">V. De Leo</a>, <a href="/search/hep-ex?searchtype=author&query=De+Lucia%2C+E">E. De Lucia</a>, <a href="/search/hep-ex?searchtype=author&query=De+Santis%2C+A">A. De Santis</a>, <a href="/search/hep-ex?searchtype=author&query=De+Simone%2C+P">P. De Simone</a>, <a href="/search/hep-ex?searchtype=author&query=Di+Cicco%2C+A">A. Di Cicco</a>, <a href="/search/hep-ex?searchtype=author&query=Di+Domenico%2C+A">A. Di Domenico</a>, <a href="/search/hep-ex?searchtype=author&query=Diociaiuti%2C+E">E. Diociaiuti</a>, <a href="/search/hep-ex?searchtype=author&query=Domenici%2C+D">D. Domenici</a>, <a href="/search/hep-ex?searchtype=author&query=D%27Uffizi%2C+A">A. D'Uffizi</a>, <a href="/search/hep-ex?searchtype=author&query=Fantini%2C+G">G. Fantini</a>, <a href="/search/hep-ex?searchtype=author&query=Gajos%2C+A">A. Gajos</a>, <a href="/search/hep-ex?searchtype=author&query=Gamrat%2C+S">S. Gamrat</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="2208.04872v4-abstract-short" style="display: inline;"> The branching fraction for the decay $K_S \to 蟺e 谓$ has been measured with a sample of 300 million $K_S$ mesons produced in $蠁\to K_L K_S$ decays recorded by the KLOE experiment at the DA$桅$NE $e^+e^-$ collider. Signal decays are selected by a boosted decision tree built with kinematic variables and time-of-flight measurements. Data control samples of $K_L \to 蟺e 谓$ decays are used to evaluate sig… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2208.04872v4-abstract-full').style.display = 'inline'; document.getElementById('2208.04872v4-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2208.04872v4-abstract-full" style="display: none;"> The branching fraction for the decay $K_S \to 蟺e 谓$ has been measured with a sample of 300 million $K_S$ mesons produced in $蠁\to K_L K_S$ decays recorded by the KLOE experiment at the DA$桅$NE $e^+e^-$ collider. Signal decays are selected by a boosted decision tree built with kinematic variables and time-of-flight measurements. Data control samples of $K_L \to 蟺e 谓$ decays are used to evaluate signal selection efficiencies. A fit to the reconstructed electron mass distribution finds 49647$\pm$316 signal events. Normalising to the $K_S \to 蟺^+蟺^-$ decay events the result for the branching fraction is $\mathcal{B}(K_S \to 蟺e 谓) = (7.211 \pm 0.046_{\rm stat} \pm 0.052_{\rm syst}) \times10^{-4}$. The combination with our previous measurement gives $\mathcal{B}(K_S \to 蟺e 谓) = (7.153 \pm 0.037_{\rm stat} \pm 0.043_{\rm syst}) \times10^{-4}$. From this value we derive $f_+(0)|V_{us}| = 0.2170 \pm 0.009$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2208.04872v4-abstract-full').style.display = 'none'; document.getElementById('2208.04872v4-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 January, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 9 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">Comments:</span> <span class="has-text-grey-dark mathjax">arXiv admin note: substantial text overlap with arXiv:1912.05990</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2111.04328">arXiv:2111.04328</a> <span> [<a href="https://arxiv.org/pdf/2111.04328">pdf</a>, <a href="https://arxiv.org/format/2111.04328">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> <p class="title is-5 mathjax"> Precision tests of Quantum Mechanics and CPT symmetry with entangled neutral kaons at KLOE </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Babusci%2C+D">D. Babusci</a>, <a href="/search/hep-ex?searchtype=author&query=Berlowski%2C+M">M. Berlowski</a>, <a href="/search/hep-ex?searchtype=author&query=Bloise%2C+C">C. Bloise</a>, <a href="/search/hep-ex?searchtype=author&query=Bossi%2C+F">F. Bossi</a>, <a href="/search/hep-ex?searchtype=author&query=Branchini%2C+P">P. Branchini</a>, <a href="/search/hep-ex?searchtype=author&query=Budano%2C+A">A. Budano</a>, <a href="/search/hep-ex?searchtype=author&query=Cao%2C+B">B. Cao</a>, <a href="/search/hep-ex?searchtype=author&query=Ceradini%2C+F">F. Ceradini</a>, <a href="/search/hep-ex?searchtype=author&query=Ciambrone%2C+P">P. Ciambrone</a>, <a href="/search/hep-ex?searchtype=author&query=Curciarello%2C+F">F. Curciarello</a>, <a href="/search/hep-ex?searchtype=author&query=Czerwi%C5%84ski%2C+E">E. Czerwi艅ski</a>, <a href="/search/hep-ex?searchtype=author&query=D%27Agostini%2C+G">G. D'Agostini</a>, <a href="/search/hep-ex?searchtype=author&query=D%27Amico%2C+R">R. D'Amico</a>, <a href="/search/hep-ex?searchtype=author&query=Dan%C3%A8%2C+E">E. Dan猫</a>, <a href="/search/hep-ex?searchtype=author&query=De+Leo%2C+V">V. De Leo</a>, <a href="/search/hep-ex?searchtype=author&query=De+Lucia%2C+E">E. De Lucia</a>, <a href="/search/hep-ex?searchtype=author&query=De+Santis%2C+A">A. De Santis</a>, <a href="/search/hep-ex?searchtype=author&query=De+Simone%2C+P">P. De Simone</a>, <a href="/search/hep-ex?searchtype=author&query=Di+Cicco%2C+A">A. Di Cicco</a>, <a href="/search/hep-ex?searchtype=author&query=Di+Domenico%2C+A">A. Di Domenico</a>, <a href="/search/hep-ex?searchtype=author&query=Diociaiuti%2C+E">E. Diociaiuti</a>, <a href="/search/hep-ex?searchtype=author&query=Domenici%2C+D">D. Domenici</a>, <a href="/search/hep-ex?searchtype=author&query=D%27Uffizi%2C+A">A. D'Uffizi</a>, <a href="/search/hep-ex?searchtype=author&query=Fantini%2C+A">A. Fantini</a>, <a href="/search/hep-ex?searchtype=author&query=Fantini%2C+G">G. Fantini</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="2111.04328v2-abstract-short" style="display: inline;"> The quantum interference between the decays of entangled neutral kaons is studied in the process $蠁\rightarrow K_S K_L \rightarrow蟺^+蟺^-蟺^+蟺^-$, which exhibits the characteristic Einstein--Podolsky--Rosen correlations that prevent both kaons to decay into $蟺^+蟺^-$ at the same time. This constitutes a very powerful tool for testing at the utmost precision the quantum coherence of the entangled kaon… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2111.04328v2-abstract-full').style.display = 'inline'; document.getElementById('2111.04328v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2111.04328v2-abstract-full" style="display: none;"> The quantum interference between the decays of entangled neutral kaons is studied in the process $蠁\rightarrow K_S K_L \rightarrow蟺^+蟺^-蟺^+蟺^-$, which exhibits the characteristic Einstein--Podolsky--Rosen correlations that prevent both kaons to decay into $蟺^+蟺^-$ at the same time. This constitutes a very powerful tool for testing at the utmost precision the quantum coherence of the entangled kaon pair state, and to search for tiny decoherence and CPT violation effects, which may be justified in a quantum gravity framework. The analysed data sample was collected with the KLOE detector at DA$桅$NE, the Frascati $蠁$-factory, and corresponds to an integrated luminosity of about 1.7 fb$^{-1}$, i.e. to about $1.7 \times 10^9$ $蠁\rightarrow K_S K_L$ decays produced. From the fit of the observed $螖t$ distribution, being $螖t$ the difference of the kaon decay times, the decoherence and CPT violation parameters of various phenomenological models are measured with a largely improved accuracy with respect to previous analyses. The results are consistent with no deviation from quantum mechanics and CPT symmetry, while for some parameters the precision reaches the interesting level at which -- in the most optimistic scenarios -- quantum gravity effects might show up. They provide the most stringent limits up to date on the considered models. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2111.04328v2-abstract-full').style.display = 'none'; document.getElementById('2111.04328v2-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> 6 April, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 8 November, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 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">17 pages 6 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/2006.14710">arXiv:2006.14710</a> <span> [<a href="https://arxiv.org/pdf/2006.14710">pdf</a>, <a href="https://arxiv.org/ps/2006.14710">ps</a>, <a href="https://arxiv.org/format/2006.14710">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(2020)047">10.1007/JHEP10(2020)047 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Upper limit on the $畏\to蟺^{+}蟺^{-}$ branching fraction with the KLOE experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Babusci%2C+D">D. Babusci</a>, <a href="/search/hep-ex?searchtype=author&query=Berlowski%2C+M">M. Berlowski</a>, <a href="/search/hep-ex?searchtype=author&query=Bloise%2C+C">C. Bloise</a>, <a href="/search/hep-ex?searchtype=author&query=Bossi%2C+F">F. Bossi</a>, <a href="/search/hep-ex?searchtype=author&query=Branchini%2C+P">P. Branchini</a>, <a href="/search/hep-ex?searchtype=author&query=Budano%2C+A">A. Budano</a>, <a href="/search/hep-ex?searchtype=author&query=Cao%2C+B">B. Cao</a>, <a href="/search/hep-ex?searchtype=author&query=Ceradini%2C+F">F. Ceradini</a>, <a href="/search/hep-ex?searchtype=author&query=Ciambrone%2C+P">P. Ciambrone</a>, <a href="/search/hep-ex?searchtype=author&query=Curciarello%2C+F">F. Curciarello</a>, <a href="/search/hep-ex?searchtype=author&query=Czerwi%C5%84ski%2C+E">E. Czerwi艅ski</a>, <a href="/search/hep-ex?searchtype=author&query=D%27Agostini%2C+G">G. D'Agostini</a>, <a href="/search/hep-ex?searchtype=author&query=Dan%C3%A8%2C+E">E. Dan猫</a>, <a href="/search/hep-ex?searchtype=author&query=De+Leo%2C+V">V. De Leo</a>, <a href="/search/hep-ex?searchtype=author&query=De+Lucia%2C+E">E. De Lucia</a>, <a href="/search/hep-ex?searchtype=author&query=De+Santis%2C+A">A. De Santis</a>, <a href="/search/hep-ex?searchtype=author&query=De+Simone%2C+P">P. De Simone</a>, <a href="/search/hep-ex?searchtype=author&query=Di+Cicco%2C+A">A. Di Cicco</a>, <a href="/search/hep-ex?searchtype=author&query=Di+Domenico%2C+A">A. Di Domenico</a>, <a href="/search/hep-ex?searchtype=author&query=Domenici%2C+D">D. Domenici</a>, <a href="/search/hep-ex?searchtype=author&query=D%27Uffizi%2C+A">A. D'Uffizi</a>, <a href="/search/hep-ex?searchtype=author&query=Fantini%2C+A">A. Fantini</a>, <a href="/search/hep-ex?searchtype=author&query=Fermani%2C+P">P. Fermani</a>, <a href="/search/hep-ex?searchtype=author&query=Fiore%2C+S">S. Fiore</a>, <a href="/search/hep-ex?searchtype=author&query=Gajos%2C+A">A. Gajos</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="2006.14710v2-abstract-short" style="display: inline;"> Based on an integrated luminosity of 1.61 fb$^{-1}$ $e^+e^-$ collision data collected with the KLOE detector at DA$桅$NE, the Frascati $蠁$-factory, a search for the $P$- and $CP$-violating decay $畏\to蟺^{+}蟺^{-}$ has been performed. Radiative $蠁\to畏纬$ decay is exploited to access the $畏$ mesons. No signal is observed in the $蟺^{+}蟺^{-}$ invariant mass spectrum, and the upper limit on the branching f… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2006.14710v2-abstract-full').style.display = 'inline'; document.getElementById('2006.14710v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2006.14710v2-abstract-full" style="display: none;"> Based on an integrated luminosity of 1.61 fb$^{-1}$ $e^+e^-$ collision data collected with the KLOE detector at DA$桅$NE, the Frascati $蠁$-factory, a search for the $P$- and $CP$-violating decay $畏\to蟺^{+}蟺^{-}$ has been performed. Radiative $蠁\to畏纬$ decay is exploited to access the $畏$ mesons. No signal is observed in the $蟺^{+}蟺^{-}$ invariant mass spectrum, and the upper limit on the branching fraction at 90\% confidence level is determined to be ${\mathcal B}(畏\to蟺^{+}蟺^{-})<4.9\times10^{-6}$, which is approximately three times smaller than the previous KLOE result. From the combination of these two measurements we get ${\mathcal B}(畏\to蟺^{+}蟺^{-}) < 4.4\times10^{-6}$ at 90\% confidence level. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2006.14710v2-abstract-full').style.display = 'none'; document.getElementById('2006.14710v2-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> 28 February, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 25 June, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 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">11 pages, 3 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> J. High Energ. Phys. 2020, 47 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1912.05990">arXiv:1912.05990</a> <span> [<a href="https://arxiv.org/pdf/1912.05990">pdf</a>, <a href="https://arxiv.org/format/1912.05990">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="High Energy Physics - Phenomenology">hep-ph</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.2020.135378">10.1016/j.physletb.2020.135378 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of the branching fraction for the decay $K_S \to 蟺渭谓$ with the KLOE detector </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Babusci%2C+D">D. Babusci</a>, <a href="/search/hep-ex?searchtype=author&query=Berlowski%2C+M">M. Berlowski</a>, <a href="/search/hep-ex?searchtype=author&query=Bloise%2C+C">C. Bloise</a>, <a href="/search/hep-ex?searchtype=author&query=Bossi%2C+F">F. Bossi</a>, <a href="/search/hep-ex?searchtype=author&query=Branchini%2C+P">P. Branchini</a>, <a href="/search/hep-ex?searchtype=author&query=Budano%2C+A">A. Budano</a>, <a href="/search/hep-ex?searchtype=author&query=Cao%2C+B">B. Cao</a>, <a href="/search/hep-ex?searchtype=author&query=Ceradini%2C+F">F. Ceradini</a>, <a href="/search/hep-ex?searchtype=author&query=Ciambrone%2C+P">P. Ciambrone</a>, <a href="/search/hep-ex?searchtype=author&query=Curciarello%2C+F">F. Curciarello</a>, <a href="/search/hep-ex?searchtype=author&query=Czerwisnski%2C+E">E. Czerwisnski</a>, <a href="/search/hep-ex?searchtype=author&query=D%27Agostini%2C+G">G. D'Agostini</a>, <a href="/search/hep-ex?searchtype=author&query=Dan%C3%A8%2C+E">E. Dan猫</a>, <a href="/search/hep-ex?searchtype=author&query=De+Leo%2C+V">V. De Leo</a>, <a href="/search/hep-ex?searchtype=author&query=De+Lucia%2C+E">E. De Lucia</a>, <a href="/search/hep-ex?searchtype=author&query=De+Santis%2C+A">A. De Santis</a>, <a href="/search/hep-ex?searchtype=author&query=De+Simone%2C+P">P. De Simone</a>, <a href="/search/hep-ex?searchtype=author&query=Di+Cicco%2C+A">A. Di Cicco</a>, <a href="/search/hep-ex?searchtype=author&query=Di+Domenico%2C+A">A. Di Domenico</a>, <a href="/search/hep-ex?searchtype=author&query=Domenici%2C+D">D. Domenici</a>, <a href="/search/hep-ex?searchtype=author&query=D%27Uffizi%2C+A">A. D'Uffizi</a>, <a href="/search/hep-ex?searchtype=author&query=Fantini%2C+A">A. Fantini</a>, <a href="/search/hep-ex?searchtype=author&query=Fermani%2C+P">P. Fermani</a>, <a href="/search/hep-ex?searchtype=author&query=Fiore%2C+S">S. Fiore</a>, <a href="/search/hep-ex?searchtype=author&query=Gajos%2C+A">A. Gajos</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="1912.05990v3-abstract-short" style="display: inline;"> Based on a sample of 300 million $K_S$ mesons produced in $蠁\to K_L K_S$ decays recorded by the KLOE experiment at the DA$桅$NE $e^+e^-$ collider we have measured the branching fraction for the decay $K_S \to 蟺渭谓$. The $K_S$ mesons are identified by the interaction of $K_L$ mesons in the detector. The $K_S \to 蟺渭谓$ decays are selected by a boosted decision tree built with kinematic variables and by… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1912.05990v3-abstract-full').style.display = 'inline'; document.getElementById('1912.05990v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1912.05990v3-abstract-full" style="display: none;"> Based on a sample of 300 million $K_S$ mesons produced in $蠁\to K_L K_S$ decays recorded by the KLOE experiment at the DA$桅$NE $e^+e^-$ collider we have measured the branching fraction for the decay $K_S \to 蟺渭谓$. The $K_S$ mesons are identified by the interaction of $K_L$ mesons in the detector. The $K_S \to 蟺渭谓$ decays are selected by a boosted decision tree built with kinematic variables and by a time-of-flight measurement. Signal efficiencies are evaluated with data control samples of $K_L \to 蟺渭谓$ decays. A fit to the reconstructed muon mass distribution finds $7223 \pm 180$ signal events. Normalising to the $K_S \to 蟺^+ 蟺^-$ decay events the result for the branching fraction is $\mathcal{B}(K_S \to 蟺渭谓) = (4.56 \pm 0.11_{\rm stat} \pm 0.17_{\rm syst})\times10^{-4}$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1912.05990v3-abstract-full').style.display = 'none'; document.getElementById('1912.05990v3-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> 19 March, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 12 December, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2019. </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">16 pages, 12 figures, Accepted in PLB</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1907.10757">arXiv:1907.10757</a> <span> [<a href="https://arxiv.org/pdf/1907.10757">pdf</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="High Energy Physics - Phenomenology">hep-ph</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.nuclphysb.2020.115215">10.1016/j.nuclphysb.2020.115215 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Signal detection using biphotons and potential application in axion-like particle search </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Le%2C+P+H">Phuong Hoang Le</a>, <a href="/search/hep-ex?searchtype=author&query=Cao%2C+B+X">Binh Xuan Cao</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="1907.10757v2-abstract-short" style="display: inline;"> This paper presents a new optical system for detecting light signals associated with the change in incoming photon number. The system employs quantum correlation of photon pairs created via spontaneous parametric down-conversion (SPDC). The signal, if present, will perturb the flux of the incident photon stream. The perturbed photon stream is first projected through a birefringent crystal where SP… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1907.10757v2-abstract-full').style.display = 'inline'; document.getElementById('1907.10757v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1907.10757v2-abstract-full" style="display: none;"> This paper presents a new optical system for detecting light signals associated with the change in incoming photon number. The system employs quantum correlation of photon pairs created via spontaneous parametric down-conversion (SPDC). The signal, if present, will perturb the flux of the incident photon stream. The perturbed photon stream is first projected through a birefringent crystal where SPDC occurs, converting a single high-energy photon into a pair of low energy photons. The photons in each pair eventually arrive at separate detectors. By examining the biphoton correlation using the probability distribution of the photons at the detectors, which varies depending on the displacement of the main pump photon stream and the change in the number of photons, the small optical displacement of the photon stream and its variance can be determined. The change in incident photon number, in other words, the presence of light signal does not influence the average of the measured optical displacement values. Nevertheless, the change in optical displacement measurement variance when the number of incident photons has changed detects the light signal. This optical setup enables the detection of light signals with low noise and remarkably high precision and sensitivity using quantum correlation. The proposed technique has potential application for axion-like particle search in experimental high energy physics. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1907.10757v2-abstract-full').style.display = 'none'; document.getElementById('1907.10757v2-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 August, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 24 July, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2019. </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">14 pages, 4 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nuclear Physics B 961 (2020) 115215 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1807.02691">arXiv:1807.02691</a> <span> [<a href="https://arxiv.org/pdf/1807.02691">pdf</a>, <a href="https://arxiv.org/format/1807.02691">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.2018.08.012">10.1016/j.physletb.2018.08.012 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Combined limit on the production of a light gauge boson decaying into $渭^+渭^-$ and $蟺^+蟺^-$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Collaboration%2C+K">KLOE-2 Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=%3A"> :</a>, <a href="/search/hep-ex?searchtype=author&query=Anastasi%2C+A">A. Anastasi</a>, <a href="/search/hep-ex?searchtype=author&query=Babusci%2C+D">D. Babusci</a>, <a href="/search/hep-ex?searchtype=author&query=Berlowski%2C+M">M. Berlowski</a>, <a href="/search/hep-ex?searchtype=author&query=Bloise%2C+C">C. Bloise</a>, <a href="/search/hep-ex?searchtype=author&query=Bossi%2C+F">F. Bossi</a>, <a href="/search/hep-ex?searchtype=author&query=Branchini%2C+P">P. Branchini</a>, <a href="/search/hep-ex?searchtype=author&query=Budano%2C+A">A. Budano</a>, <a href="/search/hep-ex?searchtype=author&query=Cao%2C+B">B. Cao</a>, <a href="/search/hep-ex?searchtype=author&query=Ceradini%2C+F">F. Ceradini</a>, <a href="/search/hep-ex?searchtype=author&query=Ciambrone%2C+P">P. Ciambrone</a>, <a href="/search/hep-ex?searchtype=author&query=Curciarello%2C+F">F. Curciarello</a>, <a href="/search/hep-ex?searchtype=author&query=Czerwi%C5%84ski%2C+E">E. Czerwi艅ski</a>, <a href="/search/hep-ex?searchtype=author&query=D%27Agostinio%2C+G">G. D'Agostinio</a>, <a href="/search/hep-ex?searchtype=author&query=Dan%C3%A9%2C+E">E. Dan茅</a>, <a href="/search/hep-ex?searchtype=author&query=De+Leo%2C+V">V. De Leo</a>, <a href="/search/hep-ex?searchtype=author&query=De+Lucia%2C+E">E. De Lucia</a>, <a href="/search/hep-ex?searchtype=author&query=De+Santis%2C+A">A. De Santis</a>, <a href="/search/hep-ex?searchtype=author&query=De+Simone%2C+P">P. De Simone</a>, <a href="/search/hep-ex?searchtype=author&query=Di+Cicco%2C+A">A. Di Cicco</a>, <a href="/search/hep-ex?searchtype=author&query=Di+Domenico%2C+A">A. Di Domenico</a>, <a href="/search/hep-ex?searchtype=author&query=Domenici%2C+D">D. Domenici</a>, <a href="/search/hep-ex?searchtype=author&query=D%27Uffizi%2C+A">A. D'Uffizi</a>, <a href="/search/hep-ex?searchtype=author&query=Fantini%2C+A">A. Fantini</a> , et al. (35 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="1807.02691v2-abstract-short" style="display: inline;"> We searched for the $渭^+渭^-$ decay of a light vector gauge boson, also known as dark photon, in the $e^+ e^- \to 渭^+ 渭^- 纬_{\rm ISR}$ process by means of the Initial State Radiation (ISR) method. We used 1.93~fb$^{-1}$ of data collected by the KLOE experiment at the DA$桅$NE $蠁$-factory. No structures have been observed over the irreducible $渭^+ 渭^-$ background. A 90\% CL limit on the ratio… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1807.02691v2-abstract-full').style.display = 'inline'; document.getElementById('1807.02691v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1807.02691v2-abstract-full" style="display: none;"> We searched for the $渭^+渭^-$ decay of a light vector gauge boson, also known as dark photon, in the $e^+ e^- \to 渭^+ 渭^- 纬_{\rm ISR}$ process by means of the Initial State Radiation (ISR) method. We used 1.93~fb$^{-1}$ of data collected by the KLOE experiment at the DA$桅$NE $蠁$-factory. No structures have been observed over the irreducible $渭^+ 渭^-$ background. A 90\% CL limit on the ratio $\varepsilon^2=伪^{\prime}/伪$ between the dark coupling constant and the fine structure constant of $ 3\times 10^{-6}-2\times 10^{-7}$ has been set in the dark photon mass region between 519 MeV and 973 MeV. This new limit has been combined with the published result obtained investigating the hypothesis of the dark photon decaying into hadrons in $e^+ e^- \to 蟺^+ 蟺^- 纬_{\rm ISR}$ events. The combined 90\% CL limit increases the sensitivity especially in the $蟻-蠅$ interference region and excludes $\varepsilon^2$ greater than $(13-2)\times 10^{-7}$. For dark photon masses greater than 600 MeV the combined limit is lower than 8~$\times\, 10^{-7}$ resulting more stringent than present constraints from other experiments. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1807.02691v2-abstract-full').style.display = 'none'; document.getElementById('1807.02691v2-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> 9 August, 2018; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 7 July, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2018. </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">7 pages, 9 figures, 1 table, accepted for publication in Physics Letters B</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Physics Letters B 784 (2018), 336 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1806.08654">arXiv:1806.08654</a> <span> [<a href="https://arxiv.org/pdf/1806.08654">pdf</a>, <a href="https://arxiv.org/format/1806.08654">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/JHEP09(2018)021">10.1007/JHEP09(2018)021 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of the charge asymmetry for the $K_S \rightarrow 蟺e 谓$ decay and test of CPT symmetry with the KLOE detector </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Anastasi%2C+A">A. Anastasi</a>, <a href="/search/hep-ex?searchtype=author&query=Babusci%2C+D">D. Babusci</a>, <a href="/search/hep-ex?searchtype=author&query=Ber%C5%82owski%2C+M">M. Ber艂owski</a>, <a href="/search/hep-ex?searchtype=author&query=Bloise%2C+C">C. Bloise</a>, <a href="/search/hep-ex?searchtype=author&query=Bossi%2C+F">F. Bossi</a>, <a href="/search/hep-ex?searchtype=author&query=Branchini%2C+P">P. Branchini</a>, <a href="/search/hep-ex?searchtype=author&query=Budano%2C+A">A. Budano</a>, <a href="/search/hep-ex?searchtype=author&query=Cao%2C+B">B. Cao</a>, <a href="/search/hep-ex?searchtype=author&query=Capon%2C+G">G. Capon</a>, <a href="/search/hep-ex?searchtype=author&query=Ceradini%2C+F">F. Ceradini</a>, <a href="/search/hep-ex?searchtype=author&query=Ciambrone%2C+P">P. Ciambrone</a>, <a href="/search/hep-ex?searchtype=author&query=Curciarello%2C+F">F. Curciarello</a>, <a href="/search/hep-ex?searchtype=author&query=Czerwi%C5%84ski%2C+E">E. Czerwi艅ski</a>, <a href="/search/hep-ex?searchtype=author&query=D%27Agostini%2C+G">G. D'Agostini</a>, <a href="/search/hep-ex?searchtype=author&query=Dan%C3%A8%2C+E">E. Dan猫</a>, <a href="/search/hep-ex?searchtype=author&query=De+Leo%2C+V">V. De Leo</a>, <a href="/search/hep-ex?searchtype=author&query=De+Lucia%2C+E">E. De Lucia</a>, <a href="/search/hep-ex?searchtype=author&query=De+Santis%2C+A">A. De Santis</a>, <a href="/search/hep-ex?searchtype=author&query=De+Simone%2C+P">P. De Simone</a>, <a href="/search/hep-ex?searchtype=author&query=Di+Cicco%2C+A">A. Di Cicco</a>, <a href="/search/hep-ex?searchtype=author&query=Di+Domenico%2C+A">A. Di Domenico</a>, <a href="/search/hep-ex?searchtype=author&query=Domenici%2C+D">D. Domenici</a>, <a href="/search/hep-ex?searchtype=author&query=D%27Uffizi%2C+A">A. D'Uffizi</a>, <a href="/search/hep-ex?searchtype=author&query=Fantini%2C+A">A. Fantini</a>, <a href="/search/hep-ex?searchtype=author&query=Fantini%2C+G">G. Fantini</a> , et al. (35 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="1806.08654v2-abstract-short" style="display: inline;"> Using 1.63 fb$^{-1}$ of integrated luminosity collected by the KLOE experiment about $7\times 10^4$ $K_S \rightarrow 蟺^{\pm}e^{\mp}谓$ decays have been reconstructed. The measured value of the charge asymmetry for this decay is $A_S = (-4.9 \pm 5.7_{stat} \pm 2.6_{syst}) \times 10^{-3}$, which is almost twice more precise than the previous KLOE result. The combination of these two measurements give… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1806.08654v2-abstract-full').style.display = 'inline'; document.getElementById('1806.08654v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1806.08654v2-abstract-full" style="display: none;"> Using 1.63 fb$^{-1}$ of integrated luminosity collected by the KLOE experiment about $7\times 10^4$ $K_S \rightarrow 蟺^{\pm}e^{\mp}谓$ decays have been reconstructed. The measured value of the charge asymmetry for this decay is $A_S = (-4.9 \pm 5.7_{stat} \pm 2.6_{syst}) \times 10^{-3}$, which is almost twice more precise than the previous KLOE result. The combination of these two measurements gives $A_S = (-3.8 \pm 5.0_{stat} \pm 2.6_{syst}) \times 10^{-3}$ and, together with the asymmetry of the $K_L$ semileptonic decay, provides significant tests of the CPT symmetry. The obtained results are in agreement with CPT invariance. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1806.08654v2-abstract-full').style.display = 'none'; document.getElementById('1806.08654v2-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 August, 2018; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 22 June, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2018. </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">submitted to JHEP</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1711.03085">arXiv:1711.03085</a> <span> [<a href="https://arxiv.org/pdf/1711.03085">pdf</a>, <a href="https://arxiv.org/format/1711.03085">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="High Energy Physics - Phenomenology">hep-ph</span> </div> </div> <p class="title is-5 mathjax"> Combination of KLOE $蟽\big(e^+e^-\rightarrow蟺^+蟺^-纬(纬)\big)$ measurements and determination of $a_渭^{蟺^+蟺^-}$ in the energy range $0.10 < s < 0.95$ GeV$^2$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Collaboration%2C+T+K">The KLOE-2 Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=%3A"> :</a>, <a href="/search/hep-ex?searchtype=author&query=Anastasi%2C+A">A. Anastasi</a>, <a href="/search/hep-ex?searchtype=author&query=Babusci%2C+D">D. Babusci</a>, <a href="/search/hep-ex?searchtype=author&query=Berlowski%2C+M">M. Berlowski</a>, <a href="/search/hep-ex?searchtype=author&query=Bloise%2C+C">C. Bloise</a>, <a href="/search/hep-ex?searchtype=author&query=Bossi%2C+F">F. Bossi</a>, <a href="/search/hep-ex?searchtype=author&query=Branchini%2C+P">P. Branchini</a>, <a href="/search/hep-ex?searchtype=author&query=Budano%2C+A">A. Budano</a>, <a href="/search/hep-ex?searchtype=author&query=Balkest%C3%A5hl%2C+L+C">L. Caldeira Balkest氓hl</a>, <a href="/search/hep-ex?searchtype=author&query=Cao%2C+B">B. Cao</a>, <a href="/search/hep-ex?searchtype=author&query=Ceradini%2C+F">F. Ceradini</a>, <a href="/search/hep-ex?searchtype=author&query=Ciambrone%2C+P">P. Ciambrone</a>, <a href="/search/hep-ex?searchtype=author&query=Curciarello%2C+F">F. Curciarello</a>, <a href="/search/hep-ex?searchtype=author&query=Czerwi%C5%84ski%2C+E">E. Czerwi艅ski</a>, <a href="/search/hep-ex?searchtype=author&query=D%27Agostini%2C+G">G. D'Agostini</a>, <a href="/search/hep-ex?searchtype=author&query=Dan%C3%A8%2C+E">E. Dan猫</a>, <a href="/search/hep-ex?searchtype=author&query=De+Leo%2C+V">V. De Leo</a>, <a href="/search/hep-ex?searchtype=author&query=De+Lucia%2C+E">E. De Lucia</a>, <a href="/search/hep-ex?searchtype=author&query=De+Santis%2C+A">A. De Santis</a>, <a href="/search/hep-ex?searchtype=author&query=De+Simone%2C+P">P. De Simone</a>, <a href="/search/hep-ex?searchtype=author&query=Di+Cicco%2C+A">A. Di Cicco</a>, <a href="/search/hep-ex?searchtype=author&query=Di+Domenico%2C+A">A. Di Domenico</a>, <a href="/search/hep-ex?searchtype=author&query=Domenici%2C+D">D. Domenici</a>, <a href="/search/hep-ex?searchtype=author&query=D%27Uffizi%2C+A">A. D'Uffizi</a> , et al. (41 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="1711.03085v2-abstract-short" style="display: inline;"> The three precision measurements of the cross section $蟽\big(e^+e^-\rightarrow蟺^+蟺^-纬(纬)\big)$ using initial state radiation by the KLOE collaboration provide an important input for the prediction of the hadronic contribution to the anomalous magnetic moment of the muon. These measurements are correlated for both statistical and systematic uncertainties and, therefore, the simultaneous use of thes… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1711.03085v2-abstract-full').style.display = 'inline'; document.getElementById('1711.03085v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1711.03085v2-abstract-full" style="display: none;"> The three precision measurements of the cross section $蟽\big(e^+e^-\rightarrow蟺^+蟺^-纬(纬)\big)$ using initial state radiation by the KLOE collaboration provide an important input for the prediction of the hadronic contribution to the anomalous magnetic moment of the muon. These measurements are correlated for both statistical and systematic uncertainties and, therefore, the simultaneous use of these measurements requires covariance matrices that fully describe the correlations. We present the construction of these covariance matrices and use them to determine a combined KLOE measurement for $蟽\big(e^+e^-\rightarrow蟺^+蟺^-纬(纬)\big)$. We find, from this combination, a two-pion contribution to the muon magnetic anomaly in the energy range $0.10 < s < 0.95$ GeV$^2$ of $a_渭^{蟺^+蟺^-} = (489.8 \pm 1.7_{\rm stat} \pm 4.8_{\rm sys} ) \times 10^{-10}$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1711.03085v2-abstract-full').style.display = 'none'; document.getElementById('1711.03085v2-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, 2018; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 8 November, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 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">20 pages, 8 figures. Version as published in JHEP 1803 (2018) 173</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1609.06631">arXiv:1609.06631</a> <span> [<a href="https://arxiv.org/pdf/1609.06631">pdf</a>, <a href="https://arxiv.org/format/1609.06631">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="High Energy Physics - Phenomenology">hep-ph</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.2016.12.016">10.1016/j.physletb.2016.12.016 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of the running of the fine structure constant below 1 GeV with the KLOE Detector </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Collaboration%2C+T+K">The KLOE-2 Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=%3A"> :</a>, <a href="/search/hep-ex?searchtype=author&query=Anastasi%2C+A">A. Anastasi</a>, <a href="/search/hep-ex?searchtype=author&query=Babusci%2C+D">D. Babusci</a>, <a href="/search/hep-ex?searchtype=author&query=Bencivenni%2C+G">G. Bencivenni</a>, <a href="/search/hep-ex?searchtype=author&query=Berlowski%2C+M">M. Berlowski</a>, <a href="/search/hep-ex?searchtype=author&query=Bloise%2C+C">C. Bloise</a>, <a href="/search/hep-ex?searchtype=author&query=Bossi%2C+F">F. Bossi</a>, <a href="/search/hep-ex?searchtype=author&query=Branchini%2C+P">P. Branchini</a>, <a href="/search/hep-ex?searchtype=author&query=Budano%2C+A">A. Budano</a>, <a href="/search/hep-ex?searchtype=author&query=Balkest%C3%A5hl%2C+L+C">L. Caldeira Balkest氓hl</a>, <a href="/search/hep-ex?searchtype=author&query=Cao%2C+B">B. Cao</a>, <a href="/search/hep-ex?searchtype=author&query=Ceradini%2C+F">F. Ceradini</a>, <a href="/search/hep-ex?searchtype=author&query=Ciambrone%2C+P">P. Ciambrone</a>, <a href="/search/hep-ex?searchtype=author&query=Curciarello%2C+F">F. Curciarello</a>, <a href="/search/hep-ex?searchtype=author&query=Czerwi%C5%84ski%2C+E">E. Czerwi艅ski</a>, <a href="/search/hep-ex?searchtype=author&query=D%27Agostini%2C+G">G. D'Agostini</a>, <a href="/search/hep-ex?searchtype=author&query=Dan%C3%A9%2C+E">E. Dan茅</a>, <a href="/search/hep-ex?searchtype=author&query=De+Leo%2C+V">V. De Leo</a>, <a href="/search/hep-ex?searchtype=author&query=De+Lucia%2C+E">E. De Lucia</a>, <a href="/search/hep-ex?searchtype=author&query=De+Santis%2C+A">A. De Santis</a>, <a href="/search/hep-ex?searchtype=author&query=De+Simone%2C+P">P. De Simone</a>, <a href="/search/hep-ex?searchtype=author&query=Di+Cicco%2C+A">A. Di Cicco</a>, <a href="/search/hep-ex?searchtype=author&query=Di+Domenico%2C+A">A. Di Domenico</a>, <a href="/search/hep-ex?searchtype=author&query=Di+Salvo%2C+R">R. Di Salvo</a> , et al. (42 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="1609.06631v2-abstract-short" style="display: inline;"> We have measured the running of the effective QED coupling constant $伪(s)$ in the time-like region $0.6<\sqrt s< 0.975$ GeV with the KLOE detector at DA$桅$NE using the Initial State Radiation process $e^+e^-\to渭^+ 渭^-纬$. It represents the first measurement of the running of $伪(s)$ in this energy region. Our results show a more than 5$蟽$ significance of the hadronic contribution to the running of… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1609.06631v2-abstract-full').style.display = 'inline'; document.getElementById('1609.06631v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1609.06631v2-abstract-full" style="display: none;"> We have measured the running of the effective QED coupling constant $伪(s)$ in the time-like region $0.6<\sqrt s< 0.975$ GeV with the KLOE detector at DA$桅$NE using the Initial State Radiation process $e^+e^-\to渭^+ 渭^-纬$. It represents the first measurement of the running of $伪(s)$ in this energy region. Our results show a more than 5$蟽$ significance of the hadronic contribution to the running of $伪(s)$, which is the strongest direct evidence both in time- and space-like regions achieved in a single measurement. By using the $e^+e^-\to蟺^+蟺^-$ cross section measured by KLOE, the real and imaginary part of the shift $螖伪(s)$ has been extracted. By a fit of the real part of $螖伪(s)$ and assuming the lepton universality the branching ratio $BR(蠅\to渭^+渭^-) = (6.6\pm1.4_{stat}\pm1.7_{syst})\cdot 10^{-5} $ has been determined. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1609.06631v2-abstract-full').style.display = 'none'; document.getElementById('1609.06631v2-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 April, 2017; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 21 September, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 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">19 pages, 8 figures, version accepted for publication in Phys. Lett. B</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1603.06086">arXiv:1603.06086</a> <span> [<a href="https://arxiv.org/pdf/1603.06086">pdf</a>, <a href="https://arxiv.org/format/1603.06086">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.2016.04.019">10.1016/j.physletb.2016.04.019 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Limit on the production of a new vector boson in $\mathrm{e^+ e^-}\rightarrow {\rm U}纬$, U$\rightarrow 蟺^+蟺^-$ with the KLOE experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Collaboration%2C+K">KLOE-2 Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=%3A"> :</a>, <a href="/search/hep-ex?searchtype=author&query=Anastasi%2C+A">A. Anastasi</a>, <a href="/search/hep-ex?searchtype=author&query=Babusci%2C+D">D. Babusci</a>, <a href="/search/hep-ex?searchtype=author&query=Bencivenni%2C+G">G. Bencivenni</a>, <a href="/search/hep-ex?searchtype=author&query=Berlowski%2C+M">M. Berlowski</a>, <a href="/search/hep-ex?searchtype=author&query=Bloise%2C+C">C. Bloise</a>, <a href="/search/hep-ex?searchtype=author&query=Bossi%2C+F">F. Bossi</a>, <a href="/search/hep-ex?searchtype=author&query=Branchini%2C+P">P. Branchini</a>, <a href="/search/hep-ex?searchtype=author&query=Budano%2C+A">A. Budano</a>, <a href="/search/hep-ex?searchtype=author&query=Balkest%C3%A5hl%2C+L+C">L. Caldeira Balkest氓hl</a>, <a href="/search/hep-ex?searchtype=author&query=Cao%2C+B">B. Cao</a>, <a href="/search/hep-ex?searchtype=author&query=Ceradini%2C+F">F. Ceradini</a>, <a href="/search/hep-ex?searchtype=author&query=Ciambrone%2C+P">P. Ciambrone</a>, <a href="/search/hep-ex?searchtype=author&query=Curciarello%2C+F">F. Curciarello</a>, <a href="/search/hep-ex?searchtype=author&query=Czerwinski%2C+E">E. Czerwinski</a>, <a href="/search/hep-ex?searchtype=author&query=D%27Agostini%2C+G">G. D'Agostini</a>, <a href="/search/hep-ex?searchtype=author&query=Dan%C3%A8%2C+E">E. Dan猫</a>, <a href="/search/hep-ex?searchtype=author&query=De+Leo%2C+V">V. De Leo</a>, <a href="/search/hep-ex?searchtype=author&query=De+Lucia%2C+E">E. De Lucia</a>, <a href="/search/hep-ex?searchtype=author&query=De+Santis%2C+A">A. De Santis</a>, <a href="/search/hep-ex?searchtype=author&query=De+Simone%2C+P">P. De Simone</a>, <a href="/search/hep-ex?searchtype=author&query=Di+Cicco%2C+A">A. Di Cicco</a>, <a href="/search/hep-ex?searchtype=author&query=Di+Domenico%2C+A">A. Di Domenico</a>, <a href="/search/hep-ex?searchtype=author&query=Di+Salvo%2C+R">R. Di Salvo</a> , et al. (41 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="1603.06086v1-abstract-short" style="display: inline;"> The recent interest in a light gauge boson in the framework of an extra U(1) symmetry motivates searches in the mass range below 1 GeV. We present a search for such a particle, the dark photon, in ${\rm e^+ e^-}\rightarrow {\rm U}纬$, U$\rightarrow 蟺^+蟺^-$ based on 28 million $\mathrm{e^+ e^-} \rightarrow 蟺^+ 蟺^-纬$ events collected at DA$桅$NE by the KLOE experiment. The $蟺^+ 蟺^-$ production by in… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1603.06086v1-abstract-full').style.display = 'inline'; document.getElementById('1603.06086v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1603.06086v1-abstract-full" style="display: none;"> The recent interest in a light gauge boson in the framework of an extra U(1) symmetry motivates searches in the mass range below 1 GeV. We present a search for such a particle, the dark photon, in ${\rm e^+ e^-}\rightarrow {\rm U}纬$, U$\rightarrow 蟺^+蟺^-$ based on 28 million $\mathrm{e^+ e^-} \rightarrow 蟺^+ 蟺^-纬$ events collected at DA$桅$NE by the KLOE experiment. The $蟺^+ 蟺^-$ production by initial-state radiation compensates for a loss of sensitivity of previous KLOE ${\rm U} \rightarrow \mathrm{e^+ e^-}$, $渭^+渭^-$ searches due to the small branching ratios in the $蟻-蠅$ resonance region. We found no evidence for a signal and set a limit at 90\% CL on the mixing strength between the photon and the dark photon, $\varepsilon^2$, in the U mass range between $527$ and $987$~MeV. Above 700 MeV this new limit is more stringent than previous ones. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1603.06086v1-abstract-full').style.display = 'none'; document.getElementById('1603.06086v1-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> 19 March, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 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">6 pages, 9 figures, 1 table, submitted to Phys. Lett. B</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Physics Letters B 757 (2016) pp. 356-361 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1601.06985">arXiv:1601.06985</a> <span> [<a href="https://arxiv.org/pdf/1601.06985">pdf</a>, <a href="https://arxiv.org/format/1601.06985">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> <p class="title is-5 mathjax"> Precision measurement of the $畏\to蟺^+蟺^-蟺^0$ Dalitz plot distribution with the KLOE detector </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Collaboration%2C+K">KLOE-2 Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=%3A"> :</a>, <a href="/search/hep-ex?searchtype=author&query=Anastasi%2C+A">A. Anastasi</a>, <a href="/search/hep-ex?searchtype=author&query=Babusci%2C+D">D. Babusci</a>, <a href="/search/hep-ex?searchtype=author&query=Bencivenni%2C+G">G. Bencivenni</a>, <a href="/search/hep-ex?searchtype=author&query=Berlowski%2C+M">M. Berlowski</a>, <a href="/search/hep-ex?searchtype=author&query=Bloise%2C+C">C. Bloise</a>, <a href="/search/hep-ex?searchtype=author&query=Bossi%2C+F">F. Bossi</a>, <a href="/search/hep-ex?searchtype=author&query=Branchini%2C+P">P. Branchini</a>, <a href="/search/hep-ex?searchtype=author&query=Budano%2C+A">A. Budano</a>, <a href="/search/hep-ex?searchtype=author&query=Balkest%C3%A5hl%2C+L+C">L. Caldeira Balkest氓hl</a>, <a href="/search/hep-ex?searchtype=author&query=Cao%2C+B">B. Cao</a>, <a href="/search/hep-ex?searchtype=author&query=Ceradini%2C+F">F. Ceradini</a>, <a href="/search/hep-ex?searchtype=author&query=Ciambrone%2C+P">P. Ciambrone</a>, <a href="/search/hep-ex?searchtype=author&query=Curciarello%2C+F">F. Curciarello</a>, <a href="/search/hep-ex?searchtype=author&query=Czerwi%C5%84ski%2C+E">E. Czerwi艅ski</a>, <a href="/search/hep-ex?searchtype=author&query=D%27Agostini%2C+G">G. D'Agostini</a>, <a href="/search/hep-ex?searchtype=author&query=Dan%C3%A9%2C+E">E. Dan茅</a>, <a href="/search/hep-ex?searchtype=author&query=De+Leo%2C+V">V. De Leo</a>, <a href="/search/hep-ex?searchtype=author&query=De+Lucia%2C+E">E. De Lucia</a>, <a href="/search/hep-ex?searchtype=author&query=De+Santis%2C+A">A. De Santis</a>, <a href="/search/hep-ex?searchtype=author&query=De+Simone%2C+P">P. De Simone</a>, <a href="/search/hep-ex?searchtype=author&query=Di+Cicco%2C+A">A. Di Cicco</a>, <a href="/search/hep-ex?searchtype=author&query=Di+Domenico%2C+A">A. Di Domenico</a>, <a href="/search/hep-ex?searchtype=author&query=Di+Salvo%2C+R">R. Di Salvo</a> , et al. (40 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="1601.06985v1-abstract-short" style="display: inline;"> Using $1.6$ fb$^{-1}$ of $e^+ e^-\to蠁\to畏纬$ data collected with the KLOE detector at DA$桅$NE, the Dalitz plot distribution for the $畏\to 蟺^+ 蟺^- 蟺^0$ decay is studied with the world's largest sample of $\sim 4.7 \cdot 10^6$ events. The Dalitz plot density is parametrized as a polynomial expansion up to cubic terms in the normalized dimensionless variables $X$ and $Y$. The experiment is sensitive t… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1601.06985v1-abstract-full').style.display = 'inline'; document.getElementById('1601.06985v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1601.06985v1-abstract-full" style="display: none;"> Using $1.6$ fb$^{-1}$ of $e^+ e^-\to蠁\to畏纬$ data collected with the KLOE detector at DA$桅$NE, the Dalitz plot distribution for the $畏\to 蟺^+ 蟺^- 蟺^0$ decay is studied with the world's largest sample of $\sim 4.7 \cdot 10^6$ events. The Dalitz plot density is parametrized as a polynomial expansion up to cubic terms in the normalized dimensionless variables $X$ and $Y$. The experiment is sensitive to all charge conjugation conserving terms of the expansion, including a $gX^2Y$ term. The statistical uncertainty of all parameters is improved by a factor two with respect to earlier measurements. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1601.06985v1-abstract-full').style.display = 'none'; document.getElementById('1601.06985v1-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> 26 January, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 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">11 pages, 9 figures, supplement: an ascii table</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1601.06565">arXiv:1601.06565</a> <span> [<a href="https://arxiv.org/pdf/1601.06565">pdf</a>, <a href="https://arxiv.org/ps/1601.06565">ps</a>, <a href="https://arxiv.org/format/1601.06565">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="High Energy Physics - Phenomenology">hep-ph</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.2016.04.015">10.1016/j.physletb.2016.04.015 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of the $蠁\to 蟺^0 e^+e^-$ transition form factor with the KLOE detector </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Collaboration%2C+K">KLOE-2 Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=%3A"> :</a>, <a href="/search/hep-ex?searchtype=author&query=Anastasi%2C+A">A. Anastasi</a>, <a href="/search/hep-ex?searchtype=author&query=Babusci%2C+D">D. Babusci</a>, <a href="/search/hep-ex?searchtype=author&query=Bencivenni%2C+G">G. Bencivenni</a>, <a href="/search/hep-ex?searchtype=author&query=Berlowski%2C+M">M. Berlowski</a>, <a href="/search/hep-ex?searchtype=author&query=Bloise%2C+C">C. Bloise</a>, <a href="/search/hep-ex?searchtype=author&query=Bossi%2C+F">F. Bossi</a>, <a href="/search/hep-ex?searchtype=author&query=Branchini%2C+P">P. Branchini</a>, <a href="/search/hep-ex?searchtype=author&query=Budano%2C+A">A. Budano</a>, <a href="/search/hep-ex?searchtype=author&query=Balkest%C3%A5hl%2C+L+C">L. Caldeira Balkest氓hl</a>, <a href="/search/hep-ex?searchtype=author&query=Cao%2C+B">B. Cao</a>, <a href="/search/hep-ex?searchtype=author&query=Ceradini%2C+F">F. Ceradini</a>, <a href="/search/hep-ex?searchtype=author&query=Ciambrone%2C+P">P. Ciambrone</a>, <a href="/search/hep-ex?searchtype=author&query=Curciarello%2C+F">F. Curciarello</a>, <a href="/search/hep-ex?searchtype=author&query=Czerwi%C5%84ski%2C+E">E. Czerwi艅ski</a>, <a href="/search/hep-ex?searchtype=author&query=D%27Agostini%2C+G">G. D'Agostini</a>, <a href="/search/hep-ex?searchtype=author&query=Dan%C3%A8%2C+E">E. Dan猫</a>, <a href="/search/hep-ex?searchtype=author&query=De+Leo%2C+V">V. De Leo</a>, <a href="/search/hep-ex?searchtype=author&query=De+Lucia%2C+E">E. De Lucia</a>, <a href="/search/hep-ex?searchtype=author&query=De+Santis%2C+A">A. De Santis</a>, <a href="/search/hep-ex?searchtype=author&query=De+Simone%2C+P">P. De Simone</a>, <a href="/search/hep-ex?searchtype=author&query=Di+Cicco%2C+A">A. Di Cicco</a>, <a href="/search/hep-ex?searchtype=author&query=Di+Domenico%2C+A">A. Di Domenico</a>, <a href="/search/hep-ex?searchtype=author&query=Di+Salvo%2C+R">R. Di Salvo</a> , et al. (40 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="1601.06565v2-abstract-short" style="display: inline;"> A measurement of the vector to pseudoscalar conversion decay $蠁\to 蟺^0 e^+e^-$ with the KLOE experiment is presented. A sample of $\sim 9500$ signal events was selected from a data set of 1.7 fb$^{-1}$ of $e^+e^-$ collisions at $\sqrt{s} \sim m_蠁$ collected at the DA$桅$NE $e^+e^-$ collider. These events were used to obtain the first measurement of the transition form factor $| F_{蠁蟺^0}(q^2) |$ and… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1601.06565v2-abstract-full').style.display = 'inline'; document.getElementById('1601.06565v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1601.06565v2-abstract-full" style="display: none;"> A measurement of the vector to pseudoscalar conversion decay $蠁\to 蟺^0 e^+e^-$ with the KLOE experiment is presented. A sample of $\sim 9500$ signal events was selected from a data set of 1.7 fb$^{-1}$ of $e^+e^-$ collisions at $\sqrt{s} \sim m_蠁$ collected at the DA$桅$NE $e^+e^-$ collider. These events were used to obtain the first measurement of the transition form factor $| F_{蠁蟺^0}(q^2) |$ and a new measurement of the branching ratio of the decay: $\rm{BR}\,(蠁\to 蟺^0 e^+e^-) = (\,1.35 \pm 0.05^{\,\,+0.05}_{\,\,-0.10}\,) \times 10 ^{-5}$. The result improves significantly on previous measurements and is in agreement with theoretical predictions. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1601.06565v2-abstract-full').style.display = 'none'; document.getElementById('1601.06565v2-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 June, 2016; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 25 January, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 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">13 pages, 4 figures; matches published version</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Lett. B 757 (2016) 362 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1509.00740">arXiv:1509.00740</a> <span> [<a href="https://arxiv.org/pdf/1509.00740">pdf</a>, <a href="https://arxiv.org/format/1509.00740">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.2015.10.003">10.1016/j.physletb.2015.10.003 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Limit on the production of a low-mass vector boson in $\mathrm{e}^{+}\mathrm{e}^{-} \to \mathrm{U}纬$, $\mathrm{U} \to \mathrm{e}^{+}\mathrm{e}^{-}$ with the KLOE experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Anastasi%2C+A">A. Anastasi</a>, <a href="/search/hep-ex?searchtype=author&query=Babusci%2C+D">D. Babusci</a>, <a href="/search/hep-ex?searchtype=author&query=Bencivenni%2C+G">G. Bencivenni</a>, <a href="/search/hep-ex?searchtype=author&query=Berlowski%2C+M">M. Berlowski</a>, <a href="/search/hep-ex?searchtype=author&query=Bloise%2C+C">C. Bloise</a>, <a href="/search/hep-ex?searchtype=author&query=Bossi%2C+F">F. Bossi</a>, <a href="/search/hep-ex?searchtype=author&query=Branchini%2C+P">P. Branchini</a>, <a href="/search/hep-ex?searchtype=author&query=Budano%2C+A">A. Budano</a>, <a href="/search/hep-ex?searchtype=author&query=Balkest%C3%A5hl%2C+L+C">L. Caldeira Balkest氓hl</a>, <a href="/search/hep-ex?searchtype=author&query=Cao%2C+B">B. Cao</a>, <a href="/search/hep-ex?searchtype=author&query=Ceradini%2C+F">F. Ceradini</a>, <a href="/search/hep-ex?searchtype=author&query=Ciambrone%2C+P">P. Ciambrone</a>, <a href="/search/hep-ex?searchtype=author&query=Curciarello%2C+F">F. Curciarello</a>, <a href="/search/hep-ex?searchtype=author&query=Czerwi%C5%84ski%2C+E">E. Czerwi艅ski</a>, <a href="/search/hep-ex?searchtype=author&query=D%27Agostini%2C+G">G. D'Agostini</a>, <a href="/search/hep-ex?searchtype=author&query=Dan%C3%A8%2C+E">E. Dan猫</a>, <a href="/search/hep-ex?searchtype=author&query=De+Leo%2C+V">V. De Leo</a>, <a href="/search/hep-ex?searchtype=author&query=De+Lucia%2C+E">E. De Lucia</a>, <a href="/search/hep-ex?searchtype=author&query=De+Santis%2C+A">A. De Santis</a>, <a href="/search/hep-ex?searchtype=author&query=De+Simone%2C+P">P. De Simone</a>, <a href="/search/hep-ex?searchtype=author&query=Di+Cicco%2C+A">A. Di Cicco</a>, <a href="/search/hep-ex?searchtype=author&query=Di+Domenico%2C+A">A. Di Domenico</a>, <a href="/search/hep-ex?searchtype=author&query=Di+Salvo%2C+R">R. Di Salvo</a>, <a href="/search/hep-ex?searchtype=author&query=Domenici%2C+D">D. Domenici</a>, <a href="/search/hep-ex?searchtype=author&query=D%27Uffizi%2C+A">A. D'Uffizi</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="1509.00740v2-abstract-short" style="display: inline;"> The existence of a new force beyond the Standard Model is compelling because it could explain several striking astrophysical observations which fail standard interpretations. We searched for the light vector mediator of this dark force, the $\mathrm{U}$ boson, with the KLOE detector at the DA$桅$NE $\mathrm{e}^{+}\mathrm{e}^{-}$ collider. Using an integrated luminosity of 1.54 fb$^{-1}$, we studied… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1509.00740v2-abstract-full').style.display = 'inline'; document.getElementById('1509.00740v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1509.00740v2-abstract-full" style="display: none;"> The existence of a new force beyond the Standard Model is compelling because it could explain several striking astrophysical observations which fail standard interpretations. We searched for the light vector mediator of this dark force, the $\mathrm{U}$ boson, with the KLOE detector at the DA$桅$NE $\mathrm{e}^{+}\mathrm{e}^{-}$ collider. Using an integrated luminosity of 1.54 fb$^{-1}$, we studied the process $\mathrm{e}^{+}\mathrm{e}^{-} \to \mathrm{U}纬$, with $\mathrm{U} \to \mathrm{e}^{+}\mathrm{e}^{-}$, using radiative-return to search for a resonant peak in the dielectron invariant-mass distribution. We did not find evidence for a signal, and set a 90\%~CL upper limit on the mixing strength between the Standard Model photon and the dark photon, $\varepsilon^2$, at $10^{-6}$--$10^{-4}$ in the 5--520~MeV/c$^2$ mass range. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1509.00740v2-abstract-full').style.display = 'none'; document.getElementById('1509.00740v2-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> 19 October, 2015; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 2 September, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2015. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1412.5451">arXiv:1412.5451</a> <span> [<a href="https://arxiv.org/pdf/1412.5451">pdf</a>, <a href="https://arxiv.org/format/1412.5451">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> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Theory">nucl-th</span> </div> </div> <p class="title is-5 mathjax"> MesonNet 2014 International Workshop. Mini-proceedings </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Adlarson%2C+P">P. Adlarson</a>, <a href="/search/hep-ex?searchtype=author&query=Bashkanov%2C+M">M. Bashkanov</a>, <a href="/search/hep-ex?searchtype=author&query=Bijnens%2C+J">J. Bijnens</a>, <a href="/search/hep-ex?searchtype=author&query=Balkest%C3%A5hl%2C+L+C">L. Caldeira Balkest氓hl</a>, <a href="/search/hep-ex?searchtype=author&query=Cao%2C+B">B. Cao</a>, <a href="/search/hep-ex?searchtype=author&query=Colangelo%2C+G">G. Colangelo</a>, <a href="/search/hep-ex?searchtype=author&query=Curciarello%2C+F">F. Curciarello</a>, <a href="/search/hep-ex?searchtype=author&query=De+Leo%2C+V">V. De Leo</a>, <a href="/search/hep-ex?searchtype=author&query=Demmich%2C+K">K. Demmich</a>, <a href="/search/hep-ex?searchtype=author&query=Eichmann%2C+G">G. Eichmann</a>, <a href="/search/hep-ex?searchtype=author&query=Eidelman%2C+S">S. Eidelman</a>, <a href="/search/hep-ex?searchtype=author&query=Fang%2C+S">S. Fang</a>, <a href="/search/hep-ex?searchtype=author&query=Redmer%2C+C+F">C. F. Redmer</a>, <a href="/search/hep-ex?searchtype=author&query=Fritzsch%2C+C">C. Fritzsch</a>, <a href="/search/hep-ex?searchtype=author&query=Gajos%2C+A">A. Gajos</a>, <a href="/search/hep-ex?searchtype=author&query=Giovannella%2C+S">S. Giovannella</a>, <a href="/search/hep-ex?searchtype=author&query=Gonz%C3%A0lez-Sol%C3%ADs%2C+S">S. Gonz脿lez-Sol铆s</a>, <a href="/search/hep-ex?searchtype=author&query=Goudzovski%2C+E">E. Goudzovski</a>, <a href="/search/hep-ex?searchtype=author&query=Heijkenskj%C3%B6ld%2C+L">L. Heijkenskj枚ld</a>, <a href="/search/hep-ex?searchtype=author&query=Hoferichter%2C+M">M. Hoferichter</a>, <a href="/search/hep-ex?searchtype=author&query=Husek%2C+T">T. Husek</a>, <a href="/search/hep-ex?searchtype=author&query=H%C3%BCsken%2C+N">N. H眉sken</a>, <a href="/search/hep-ex?searchtype=author&query=Andersson%2C+W+I">W. I. Andersson</a>, <a href="/search/hep-ex?searchtype=author&query=Kadav%C3%BD%2C+T">T. Kadav媒</a>, <a href="/search/hep-ex?searchtype=author&query=Kami%C5%84ska%2C+D">D. Kami艅ska</a> , et al. (21 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="1412.5451v1-abstract-short" style="display: inline;"> The MesonNet International Workshop was held in the Laboratori Nazionali di Frascati from September the 29th to October the 1st, 2014, being the concluding meeting of the MesonNet research network within EU HadronPhysics3 project. MesonNet is a research network focused on light meson physics gathering experimentalist and theoreticians from Europe and abroad. An overview of the research projects re… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1412.5451v1-abstract-full').style.display = 'inline'; document.getElementById('1412.5451v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1412.5451v1-abstract-full" style="display: none;"> The MesonNet International Workshop was held in the Laboratori Nazionali di Frascati from September the 29th to October the 1st, 2014, being the concluding meeting of the MesonNet research network within EU HadronPhysics3 project. MesonNet is a research network focused on light meson physics gathering experimentalist and theoreticians from Europe and abroad. An overview of the research projects related to the scope of the network is presented in these mini-proceedings. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1412.5451v1-abstract-full').style.display = 'none'; document.getElementById('1412.5451v1-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> 17 December, 2014; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 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">93 pages, 12 figures, MesonNet 2014 International Workshop, 29/9 - 1/10 Frascati LNF INFN</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> MITP/14-089, MCTP-14-08 </p> </li> </ol> <div 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