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<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/2106.14583">arXiv:2106.14583</a> <span> [<a href="https://arxiv.org/pdf/2106.14583">pdf</a>, <a href="https://arxiv.org/format/2106.14583">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Computational Physics">physics.comp-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/10.1038/s41467-022-30687-9">10.1038/s41467-022-30687-9 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Towards Universal Neural Network Potential for Material Discovery Applicable to Arbitrary Combination of 45 Elements </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Takamoto%2C+S">So Takamoto</a>, <a href="/search/physics?searchtype=author&query=Shinagawa%2C+C">Chikashi Shinagawa</a>, <a href="/search/physics?searchtype=author&query=Motoki%2C+D">Daisuke Motoki</a>, <a href="/search/physics?searchtype=author&query=Nakago%2C+K">Kosuke Nakago</a>, <a href="/search/physics?searchtype=author&query=Li%2C+W">Wenwen Li</a>, <a href="/search/physics?searchtype=author&query=Kurata%2C+I">Iori Kurata</a>, <a href="/search/physics?searchtype=author&query=Watanabe%2C+T">Taku Watanabe</a>, <a href="/search/physics?searchtype=author&query=Yayama%2C+Y">Yoshihiro Yayama</a>, <a href="/search/physics?searchtype=author&query=Iriguchi%2C+H">Hiroki Iriguchi</a>, <a href="/search/physics?searchtype=author&query=Asano%2C+Y">Yusuke Asano</a>, <a href="/search/physics?searchtype=author&query=Onodera%2C+T">Tasuku Onodera</a>, <a href="/search/physics?searchtype=author&query=Ishii%2C+T">Takafumi Ishii</a>, <a href="/search/physics?searchtype=author&query=Kudo%2C+T">Takao Kudo</a>, <a href="/search/physics?searchtype=author&query=Ono%2C+H">Hideki Ono</a>, <a href="/search/physics?searchtype=author&query=Sawada%2C+R">Ryohto Sawada</a>, <a href="/search/physics?searchtype=author&query=Ishitani%2C+R">Ryuichiro Ishitani</a>, <a href="/search/physics?searchtype=author&query=Ong%2C+M">Marc Ong</a>, <a href="/search/physics?searchtype=author&query=Yamaguchi%2C+T">Taiki Yamaguchi</a>, <a href="/search/physics?searchtype=author&query=Kataoka%2C+T">Toshiki Kataoka</a>, <a href="/search/physics?searchtype=author&query=Hayashi%2C+A">Akihide Hayashi</a>, <a href="/search/physics?searchtype=author&query=Charoenphakdee%2C+N">Nontawat Charoenphakdee</a>, <a href="/search/physics?searchtype=author&query=Ibuka%2C+T">Takeshi Ibuka</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="2106.14583v2-abstract-short" style="display: inline;"> Computational material discovery is under intense study owing to its ability to explore the vast space of chemical systems. Neural network potentials (NNPs) have been shown to be particularly effective in conducting atomistic simulations for such purposes. However, existing NNPs are generally designed for narrow target materials, making them unsuitable for broader applications in material discover… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2106.14583v2-abstract-full').style.display = 'inline'; document.getElementById('2106.14583v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2106.14583v2-abstract-full" style="display: none;"> Computational material discovery is under intense study owing to its ability to explore the vast space of chemical systems. Neural network potentials (NNPs) have been shown to be particularly effective in conducting atomistic simulations for such purposes. However, existing NNPs are generally designed for narrow target materials, making them unsuitable for broader applications in material discovery. To overcome this issue, we have developed a universal NNP called PreFerred Potential (PFP), which is able to handle any combination of 45 elements. Particular emphasis is placed on the datasets, which include a diverse set of virtual structures used to attain the universality. We demonstrated the applicability of PFP in selected domains: lithium diffusion in LiFeSO${}_4$F, molecular adsorption in metal-organic frameworks, an order-disorder transition of Cu-Au alloys, and material discovery for a Fischer-Tropsch catalyst. They showcase the power of PFP, and this technology provides a highly useful tool for material discovery. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2106.14583v2-abstract-full').style.display = 'none'; document.getElementById('2106.14583v2-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> 1 April, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 28 June, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 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">Previous title: "PFP: Universal Neural Network Potential for Material Discovery"</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2002.09935">arXiv:2002.09935</a> <span> [<a href="https://arxiv.org/pdf/2002.09935">pdf</a>, <a href="https://arxiv.org/format/2002.09935">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Computational Physics">physics.comp-ph</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="Quantum Physics">quant-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/10.1007/s41781-020-00047-7">10.1007/s41781-020-00047-7 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Event Classification with Quantum Machine Learning in High-Energy Physics </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Terashi%2C+K">Koji Terashi</a>, <a href="/search/physics?searchtype=author&query=Kaneda%2C+M">Michiru Kaneda</a>, <a href="/search/physics?searchtype=author&query=Kishimoto%2C+T">Tomoe Kishimoto</a>, <a href="/search/physics?searchtype=author&query=Saito%2C+M">Masahiko Saito</a>, <a href="/search/physics?searchtype=author&query=Sawada%2C+R">Ryu Sawada</a>, <a href="/search/physics?searchtype=author&query=Tanaka%2C+J">Junichi Tanaka</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="2002.09935v2-abstract-short" style="display: inline;"> We present studies of quantum algorithms exploiting machine learning to classify events of interest from background events, one of the most representative machine learning applications in high-energy physics. We focus on variational quantum approach to learn the properties of input data and evaluate the performance of the event classification using both simulators and quantum computing devices. Co… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2002.09935v2-abstract-full').style.display = 'inline'; document.getElementById('2002.09935v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2002.09935v2-abstract-full" style="display: none;"> We present studies of quantum algorithms exploiting machine learning to classify events of interest from background events, one of the most representative machine learning applications in high-energy physics. We focus on variational quantum approach to learn the properties of input data and evaluate the performance of the event classification using both simulators and quantum computing devices. Comparison of the performance with standard multi-variate classification techniques based on a boosted-decision tree and a deep neural network using classical computers shows that the quantum algorithm has comparable performance with the standard techniques at the considered ranges of the number of input variables and the size of training samples. The variational quantum algorithm is tested with quantum computers, demonstrating that the discrimination of interesting events from background is feasible. Characteristic behaviors observed during a learning process using quantum circuits with extended gate structures are discussed, as well as the implications of the current performance to the application in high-energy physics experiments. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2002.09935v2-abstract-full').style.display = 'none'; document.getElementById('2002.09935v2-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> 5 January, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 23 February, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 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, 11 figures, 4 tables; revised with comments from the journal</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Comput. Softw. Big Sci. 5, 2 (2021) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1903.02175">arXiv:1903.02175</a> <span> [<a href="https://arxiv.org/pdf/1903.02175">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Computational Physics">physics.comp-ph</span> </div> </div> <p class="title is-5 mathjax"> Materials development by interpretable machine learning </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Iwasaki%2C+Y">Yuma Iwasaki</a>, <a href="/search/physics?searchtype=author&query=Sawada%2C+R">Ryoto Sawada</a>, <a href="/search/physics?searchtype=author&query=Stanev%2C+V">Valentin Stanev</a>, <a href="/search/physics?searchtype=author&query=Ishida%2C+M">Masahiko Ishida</a>, <a href="/search/physics?searchtype=author&query=Kirihara%2C+A">Akihiro Kirihara</a>, <a href="/search/physics?searchtype=author&query=Omori%2C+Y">Yasutomo Omori</a>, <a href="/search/physics?searchtype=author&query=Someya%2C+H">Hiroko Someya</a>, <a href="/search/physics?searchtype=author&query=Takeuchi%2C+I">Ichiro Takeuchi</a>, <a href="/search/physics?searchtype=author&query=Saitoh%2C+E">Eiji Saitoh</a>, <a href="/search/physics?searchtype=author&query=Shinichi%2C+Y">Yorozu Shinichi</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="1903.02175v1-abstract-short" style="display: inline;"> Machine learning technologies are expected to be great tools for scientific discoveries. In particular, materials development (which has brought a lot of innovation by finding new and better functional materials) is one of the most attractive scientific fields. To apply machine learning to actual materials development, collaboration between scientists and machine learning is becoming inevitable. H… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1903.02175v1-abstract-full').style.display = 'inline'; document.getElementById('1903.02175v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1903.02175v1-abstract-full" style="display: none;"> Machine learning technologies are expected to be great tools for scientific discoveries. In particular, materials development (which has brought a lot of innovation by finding new and better functional materials) is one of the most attractive scientific fields. To apply machine learning to actual materials development, collaboration between scientists and machine learning is becoming inevitable. However, such collaboration has been restricted so far due to black box machine learning, in which it is difficult for scientists to interpret the data-driven model from the viewpoint of material science and physics. Here, we show a material development success story that was achieved by good collaboration between scientists and one type of interpretable (explainable) machine learning called factorized asymptotic Bayesian inference hierarchical mixture of experts (FAB/HMEs). Based on material science and physics, we interpreted the data-driven model constructed by the FAB/HMEs, so that we discovered surprising correlation and knowledge about thermoelectric material. Guided by this, we carried out actual material synthesis that led to identification of a novel spin-driven thermoelectric material with the largest thermopower to date. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1903.02175v1-abstract-full').style.display = 'none'; document.getElementById('1903.02175v1-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 March, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 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">17 pages, 5 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/1903.00219">arXiv:1903.00219</a> <span> [<a href="https://arxiv.org/pdf/1903.00219">pdf</a>, <a href="https://arxiv.org/format/1903.00219">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Computational Physics">physics.comp-ph</span> </div> </div> <p class="title is-5 mathjax"> Model-Free Cluster Analysis of Physical Property Data using Information Maximizing Self-Argument Training </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Sawada%2C+R">Ryohto Sawada</a>, <a href="/search/physics?searchtype=author&query=Iwasaki%2C+Y">Yuma Iwasaki</a>, <a href="/search/physics?searchtype=author&query=Ishida%2C+M">Masahiko Ishida</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="1903.00219v1-abstract-short" style="display: inline;"> We present the semi-supervised IMSAT, a versatile classification method that works without labeled data and can be tuned by little additional information. We demonstrate how semi-supervised IMSAT can classify XRD patterns and thermoelectric hysteresis curves in the same way even though their shape and dimensions are different. Our algorithm will accelerate automation of big data collection and ope… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1903.00219v1-abstract-full').style.display = 'inline'; document.getElementById('1903.00219v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1903.00219v1-abstract-full" style="display: none;"> We present the semi-supervised IMSAT, a versatile classification method that works without labeled data and can be tuned by little additional information. We demonstrate how semi-supervised IMSAT can classify XRD patterns and thermoelectric hysteresis curves in the same way even though their shape and dimensions are different. Our algorithm will accelerate automation of big data collection and open a way to study artificial intelligent driven material development. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1903.00219v1-abstract-full').style.display = 'none'; document.getElementById('1903.00219v1-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> 1 March, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2019. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1809.08701">arXiv:1809.08701</a> <span> [<a href="https://arxiv.org/pdf/1809.08701">pdf</a>, <a href="https://arxiv.org/format/1809.08701">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/10.1016/j.nima.2019.02.010">10.1016/j.nima.2019.02.010 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Large-Area MPPC with Enhanced VUV Sensitivity for Liquid Xenon Scintillation Detector </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Ieki%2C+K">K. Ieki</a>, <a href="/search/physics?searchtype=author&query=Iwamoto%2C+T">T. Iwamoto</a>, <a href="/search/physics?searchtype=author&query=Kaneko%2C+D">D. Kaneko</a>, <a href="/search/physics?searchtype=author&query=Kobayashi%2C+S">S. Kobayashi</a>, <a href="/search/physics?searchtype=author&query=Matsuzawa%2C+N">N. Matsuzawa</a>, <a href="/search/physics?searchtype=author&query=Mori%2C+T">T. Mori</a>, <a href="/search/physics?searchtype=author&query=Ogawa%2C+S">S. Ogawa</a>, <a href="/search/physics?searchtype=author&query=Onda%2C+R">R. Onda</a>, <a href="/search/physics?searchtype=author&query=Ootani%2C+W">W. Ootani</a>, <a href="/search/physics?searchtype=author&query=Sawada%2C+R">R. Sawada</a>, <a href="/search/physics?searchtype=author&query=Sato%2C+K">K. Sato</a>, <a href="/search/physics?searchtype=author&query=Yamada%2C+R">R. Yamada</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="1809.08701v2-abstract-short" style="display: inline;"> A large-area Multi-Pixel Photon Counter (MPPC) sensitive to vacuum ultra violet (VUV) light has been developed for the liquid xenon (LXe) scintillation detector of the MEG II experiment. The LXe detector is designed to detect the 52.8\,MeV photon from the lepton flavour violating decay $渭^+ \to \mathrm{e}^+ 纬$ and is based on $900\,\ell$ LXe with a highly granular scintillation readout by 4092 VUV… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1809.08701v2-abstract-full').style.display = 'inline'; document.getElementById('1809.08701v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1809.08701v2-abstract-full" style="display: none;"> A large-area Multi-Pixel Photon Counter (MPPC) sensitive to vacuum ultra violet (VUV) light has been developed for the liquid xenon (LXe) scintillation detector of the MEG II experiment. The LXe detector is designed to detect the 52.8\,MeV photon from the lepton flavour violating decay $渭^+ \to \mathrm{e}^+ 纬$ and is based on $900\,\ell$ LXe with a highly granular scintillation readout by 4092 VUV-MPPCs with an active area of $139\,\mathrm{mm}^2$ each, totalling $0.57\,\mathrm{m}^2$. The VUV-MPPC shows an excellent performance in LXe, which includes a high photon detection efficiency (PDE) up to 21\% for the LXe scintillation light in the VUV range, a high gain, a low probability of the optical cross-talk and the after-pulsing, a low dark count rate and a good single photoelectron resolution. The large active area of the VUV-MPPC is formed by connecting four independent small VUV-MPPC chips in series to avoid the increase of the sensor capacitance and thus, to have a short pulse-decay-time, which is crucial for high rate experiments. Performance tests of 4180 VUV-MPPCs produced for the LXe detector were also carried out at room temperature prior to the installation to the detector and all of them with only a few exceptions were found to work properly. The design and performance of the VUV-MPPC are described in detail as well as the results from the performance tests at room temperature. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1809.08701v2-abstract-full').style.display = 'none'; document.getElementById('1809.08701v2-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> 5 February, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 23 September, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 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">Revised version accepted for publication in Nucl. Instr. and Meth. A, 10 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/1803.11338">arXiv:1803.11338</a> <span> [<a href="https://arxiv.org/pdf/1803.11338">pdf</a>, <a href="https://arxiv.org/format/1803.11338">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Computational Physics">physics.comp-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/10.1103/PhysRevMaterials.2.103802">10.1103/PhysRevMaterials.2.103802 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Boosting Material Modeling Using Game Tree Search </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Sawada%2C+R">Ryohto Sawada</a>, <a href="/search/physics?searchtype=author&query=Iwasaki%2C+Y">Yuma Iwasaki</a>, <a href="/search/physics?searchtype=author&query=Ishida%2C+M">Masahiko Ishida</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="1803.11338v2-abstract-short" style="display: inline;"> We demonstrate a heuristic optimization algorithm based on the game tree search for multi-component materials design. The algorithm searches for the largest spin polarization of seven-component Heusler alloys. The algorithm can find the peaks quickly and is more robust against local optima than Bayesian optimization approaches using the expected improvement or upper confidence bound approaches. We… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1803.11338v2-abstract-full').style.display = 'inline'; document.getElementById('1803.11338v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1803.11338v2-abstract-full" style="display: none;"> We demonstrate a heuristic optimization algorithm based on the game tree search for multi-component materials design. The algorithm searches for the largest spin polarization of seven-component Heusler alloys. The algorithm can find the peaks quickly and is more robust against local optima than Bayesian optimization approaches using the expected improvement or upper confidence bound approaches. We also investigate Heusler alloys including anti-site disorder and show that [Fe$_{0.9}$Co$_{0.1}$]$_{2}$Cr$_{0.95}$Mn$_{0.05}$Si$_{0.3}$Ge$_{0.7}$ has the potential to be a high spin polarized material with robustness against anti-site disorder. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1803.11338v2-abstract-full').style.display = 'none'; document.getElementById('1803.11338v2-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> 23 August, 2018; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 30 March, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 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">5 pages, 6 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Materials 2, 103802 (2018) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1801.04688">arXiv:1801.04688</a> <span> [<a href="https://arxiv.org/pdf/1801.04688">pdf</a>, <a href="https://arxiv.org/format/1801.04688">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/10.1140/epjc/s10052-018-5845-6">10.1140/epjc/s10052-018-5845-6 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The design of the MEG II experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Baldini%2C+A+M">A. M. Baldini</a>, <a href="/search/physics?searchtype=author&query=Baracchini%2C+E">E. Baracchini</a>, <a href="/search/physics?searchtype=author&query=Bemporad%2C+C">C. Bemporad</a>, <a href="/search/physics?searchtype=author&query=Berg%2C+F">F. Berg</a>, <a href="/search/physics?searchtype=author&query=Biasotti%2C+M">M. Biasotti</a>, <a href="/search/physics?searchtype=author&query=Boca%2C+G">G. Boca</a>, <a href="/search/physics?searchtype=author&query=Cattaneo%2C+P+W">P. W. Cattaneo</a>, <a href="/search/physics?searchtype=author&query=Cavoto%2C+G">G. Cavoto</a>, <a href="/search/physics?searchtype=author&query=Cei%2C+F">F. Cei</a>, <a href="/search/physics?searchtype=author&query=Chiappini%2C+M">M. Chiappini</a>, <a href="/search/physics?searchtype=author&query=Chiarello%2C+G">G. Chiarello</a>, <a href="/search/physics?searchtype=author&query=Chiri%2C+C">C. Chiri</a>, <a href="/search/physics?searchtype=author&query=Cocciolo%2C+G">G. Cocciolo</a>, <a href="/search/physics?searchtype=author&query=Corvaglia%2C+A">A. Corvaglia</a>, <a href="/search/physics?searchtype=author&query=de+Bari%2C+A">A. de Bari</a>, <a href="/search/physics?searchtype=author&query=De+Gerone%2C+M">M. De Gerone</a>, <a href="/search/physics?searchtype=author&query=D%27Onofrio%2C+A">A. D'Onofrio</a>, <a href="/search/physics?searchtype=author&query=Francesconi%2C+M">M. Francesconi</a>, <a href="/search/physics?searchtype=author&query=Fujii%2C+Y">Y. Fujii</a>, <a href="/search/physics?searchtype=author&query=Galli%2C+L">L. Galli</a>, <a href="/search/physics?searchtype=author&query=Gatti%2C+F">F. Gatti</a>, <a href="/search/physics?searchtype=author&query=Grancagnolo%2C+F">F. Grancagnolo</a>, <a href="/search/physics?searchtype=author&query=Grassi%2C+M">M. Grassi</a>, <a href="/search/physics?searchtype=author&query=Grigoriev%2C+D+N">D. N. Grigoriev</a>, <a href="/search/physics?searchtype=author&query=Hildebrandt%2C+M">M. Hildebrandt</a> , et al. (55 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="1801.04688v1-abstract-short" style="display: inline;"> The MEG experiment, designed to search for the mu+->e+ gamma decay at a 10^-13 sensitivity level, completed data taking in 2013. In order to increase the sensitivity reach of the experiment by an order of magnitude to the level of 6 x 10-14 for the branching ratio, a total upgrade, involving substantial changes to the experiment, has been undertaken, known as MEG II. We present both the motivation… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1801.04688v1-abstract-full').style.display = 'inline'; document.getElementById('1801.04688v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1801.04688v1-abstract-full" style="display: none;"> The MEG experiment, designed to search for the mu+->e+ gamma decay at a 10^-13 sensitivity level, completed data taking in 2013. In order to increase the sensitivity reach of the experiment by an order of magnitude to the level of 6 x 10-14 for the branching ratio, a total upgrade, involving substantial changes to the experiment, has been undertaken, known as MEG II. We present both the motivation for the upgrade and a detailed overview of the design of the experiment and of the expected detector performance. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1801.04688v1-abstract-full').style.display = 'none'; document.getElementById('1801.04688v1-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> 15 January, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 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">61 pages and 97 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Eur. Phys. J. C 78 (380) (2018) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1601.01389">arXiv:1601.01389</a> <span> [<a href="https://arxiv.org/pdf/1601.01389">pdf</a>, <a href="https://arxiv.org/format/1601.01389">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Computational Physics">physics.comp-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Chemical Physics">physics.chem-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/10.1103/PhysRevA.93.023434">10.1103/PhysRevA.93.023434 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Implementation of the multiconfiguration time-dependent Hatree-Fock method for general molecules on a multi-resolution Cartesian grid </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Sawada%2C+R">Ryohto Sawada</a>, <a href="/search/physics?searchtype=author&query=Sato%2C+T">Takeshi Sato</a>, <a href="/search/physics?searchtype=author&query=Ishikawa%2C+K+L">Kenichi L. Ishikawa</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="1601.01389v3-abstract-short" style="display: inline;"> We report a three-dimensional numerical implementation of multiconfiguration time-dependent Hartree-Fock (MCTDHF) based on a multi-resolution Cartesian grid, with no need to assume any symmetry of molecular structure. We successfully compute high-harmonic generation (HHG) of H2 and H2O. The present implementation will open a way to the first-principle theoretical study of intense-field and attosec… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1601.01389v3-abstract-full').style.display = 'inline'; document.getElementById('1601.01389v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1601.01389v3-abstract-full" style="display: none;"> We report a three-dimensional numerical implementation of multiconfiguration time-dependent Hartree-Fock (MCTDHF) based on a multi-resolution Cartesian grid, with no need to assume any symmetry of molecular structure. We successfully compute high-harmonic generation (HHG) of H2 and H2O. The present implementation will open a way to the first-principle theoretical study of intense-field and attosecond-pulse induced ultrafast phenomena in general molecules. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1601.01389v3-abstract-full').style.display = 'none'; document.getElementById('1601.01389v3-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 March, 2016; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 6 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">8 pages, 4 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. A 93, 023434 (2016) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1510.04743">arXiv:1510.04743</a> <span> [<a href="https://arxiv.org/pdf/1510.04743">pdf</a>, <a href="https://arxiv.org/ps/1510.04743">ps</a>, <a href="https://arxiv.org/format/1510.04743">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="Instrumentation and Detectors">physics.ins-det</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/10.1140/epjc/s10052-016-4047-3">10.1140/epjc/s10052-016-4047-3 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Muon polarization in the MEG experiment: predictions and measurements </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Baldini%2C+A+M">A. M. Baldini</a>, <a href="/search/physics?searchtype=author&query=Bao%2C+Y">Y. Bao</a>, <a href="/search/physics?searchtype=author&query=Baracchini%2C+E">E. Baracchini</a>, <a href="/search/physics?searchtype=author&query=Bemporad%2C+C">C. Bemporad</a>, <a href="/search/physics?searchtype=author&query=Berg%2C+F">F. Berg</a>, <a href="/search/physics?searchtype=author&query=Biasotti%2C+M">M. Biasotti</a>, <a href="/search/physics?searchtype=author&query=Boca%2C+G">G. Boca</a>, <a href="/search/physics?searchtype=author&query=Cattaneo%2C+P+W">P. W. Cattaneo</a>, <a href="/search/physics?searchtype=author&query=Cavoto%2C+G">G. Cavoto</a>, <a href="/search/physics?searchtype=author&query=Cei%2C+F">F. Cei</a>, <a href="/search/physics?searchtype=author&query=Chiarello%2C+G">G. Chiarello</a>, <a href="/search/physics?searchtype=author&query=Chiri%2C+C">C. Chiri</a>, <a href="/search/physics?searchtype=author&query=De+Bari%2C+A">A. De Bari</a>, <a href="/search/physics?searchtype=author&query=De+Gerone%2C+M">M. De Gerone</a>, <a href="/search/physics?searchtype=author&query=D%C3%93nofrio%2C+A">A. D脫nofrio</a>, <a href="/search/physics?searchtype=author&query=Dussoni%2C+S">S. Dussoni</a>, <a href="/search/physics?searchtype=author&query=Fujii%2C+Y">Y. Fujii</a>, <a href="/search/physics?searchtype=author&query=Galli%2C+L">L. Galli</a>, <a href="/search/physics?searchtype=author&query=Gatti%2C+F">F. Gatti</a>, <a href="/search/physics?searchtype=author&query=Grancagnolo%2C+F">F. Grancagnolo</a>, <a href="/search/physics?searchtype=author&query=Grassi%2C+M">M. Grassi</a>, <a href="/search/physics?searchtype=author&query=Graziosi%2C+A">A. Graziosi</a>, <a href="/search/physics?searchtype=author&query=Grigoriev%2C+D+N">D. N. Grigoriev</a>, <a href="/search/physics?searchtype=author&query=Haruyama%2C+T">T. Haruyama</a>, <a href="/search/physics?searchtype=author&query=Hildebrandt%2C+M">M. Hildebrandt</a> , et al. (45 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="1510.04743v2-abstract-short" style="display: inline;"> The MEG experiment makes use of one of the world's most intense low energy muon beams, in order to search for the lepton flavour violating process $渭^{+} \rightarrow {\rm e}^{+} 纬$. We determined the residual beam polarization at the thin stopping target, by measuring the asymmetry of the angular distribution of Michel decay positrons as a function of energy. The initial muon beam polarization at… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1510.04743v2-abstract-full').style.display = 'inline'; document.getElementById('1510.04743v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1510.04743v2-abstract-full" style="display: none;"> The MEG experiment makes use of one of the world's most intense low energy muon beams, in order to search for the lepton flavour violating process $渭^{+} \rightarrow {\rm e}^{+} 纬$. We determined the residual beam polarization at the thin stopping target, by measuring the asymmetry of the angular distribution of Michel decay positrons as a function of energy. The initial muon beam polarization at the production is predicted to be $P_渭 = -1$ by the Standard Model (SM) with massless neutrinos. We estimated our residual muon polarization to be $P_渭 = -0.85 \pm 0.03 ~ {\rm (stat)} ~ { }^{+ 0.04}_{-0.05} ~ {\rm (syst)}$ at the stopping target, which is consistent with the SM predictions when the depolarizing effects occurring during the muon production, propagation and moderation in the target are taken into account. The knowledge of beam polarization is of fundamental importance in order to model the background of our ${\megsign}$ search induced by the muon radiative decay: $渭^{+} \rightarrow {\rm e}^{+} \bar谓_渭谓_{\rm e} 纬$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1510.04743v2-abstract-full').style.display = 'none'; document.getElementById('1510.04743v2-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 April, 2016; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 15 October, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2015. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Eur. Phys. J. C (2016) 76:223 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1312.3217">arXiv:1312.3217</a> <span> [<a href="https://arxiv.org/pdf/1312.3217">pdf</a>, <a href="https://arxiv.org/format/1312.3217">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> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</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/10.1140/epjc/s10052-016-3947-6">10.1140/epjc/s10052-016-3947-6 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of the radiative decay of polarized muons in the MEG experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=MEG+Collaboration"> MEG Collaboration</a>, <a href="/search/physics?searchtype=author&query=Baldini%2C+A+M">A. M. Baldini</a>, <a href="/search/physics?searchtype=author&query=Bao%2C+Y">Y. Bao</a>, <a href="/search/physics?searchtype=author&query=Baracchini%2C+E">E. Baracchini</a>, <a href="/search/physics?searchtype=author&query=Bemporad%2C+C">C. Bemporad</a>, <a href="/search/physics?searchtype=author&query=Berg%2C+F">F. Berg</a>, <a href="/search/physics?searchtype=author&query=Biasotti%2C+M">M. Biasotti</a>, <a href="/search/physics?searchtype=author&query=Boca%2C+G">G. Boca</a>, <a href="/search/physics?searchtype=author&query=Cattaneo%2C+P+W">P. W. Cattaneo</a>, <a href="/search/physics?searchtype=author&query=Cavoto%2C+G">G. Cavoto</a>, <a href="/search/physics?searchtype=author&query=Cei%2C+F">F. Cei</a>, <a href="/search/physics?searchtype=author&query=Chiarello%2C+G">G. Chiarello</a>, <a href="/search/physics?searchtype=author&query=Chiri%2C+C">C. Chiri</a>, <a href="/search/physics?searchtype=author&query=de+Bari%2C+A">A. de Bari</a>, <a href="/search/physics?searchtype=author&query=De+Gerone%2C+M">M. De Gerone</a>, <a href="/search/physics?searchtype=author&query=D%27Onofrio%2C+A">A. D'Onofrio</a>, <a href="/search/physics?searchtype=author&query=Dussoni%2C+S">S. Dussoni</a>, <a href="/search/physics?searchtype=author&query=Fujii%2C+Y">Y. Fujii</a>, <a href="/search/physics?searchtype=author&query=Galli%2C+L">L. Galli</a>, <a href="/search/physics?searchtype=author&query=Gatti%2C+F">F. Gatti</a>, <a href="/search/physics?searchtype=author&query=Grancagnolo%2C+F">F. Grancagnolo</a>, <a href="/search/physics?searchtype=author&query=Grassi%2C+M">M. Grassi</a>, <a href="/search/physics?searchtype=author&query=Graziosi%2C+A">A. Graziosi</a>, <a href="/search/physics?searchtype=author&query=Grigoriev%2C+D+N">D. N. Grigoriev</a>, <a href="/search/physics?searchtype=author&query=Haruyama%2C+T">T. Haruyama</a> , et al. (46 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="1312.3217v3-abstract-short" style="display: inline;"> We studied the radiative muon decay $渭^+ \to e^+谓\bar谓纬$ by using for the first time an almost fully polarized muon source. We identified a large sample (~13000) of these decays in a total sample of 1.8x10^14 positive muon decays collected in the MEG experiment in the years 2009--2010 and measured the branching ratio B($渭^+ \to e^+谓\bar谓纬$) = (6.03+-0.14(stat.)+-0.53(sys.))x10^-8 for E_e > 45 MeV… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1312.3217v3-abstract-full').style.display = 'inline'; document.getElementById('1312.3217v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1312.3217v3-abstract-full" style="display: none;"> We studied the radiative muon decay $渭^+ \to e^+谓\bar谓纬$ by using for the first time an almost fully polarized muon source. We identified a large sample (~13000) of these decays in a total sample of 1.8x10^14 positive muon decays collected in the MEG experiment in the years 2009--2010 and measured the branching ratio B($渭^+ \to e^+谓\bar谓纬$) = (6.03+-0.14(stat.)+-0.53(sys.))x10^-8 for E_e > 45 MeV and E_纬 > 40 MeV, consistent with the Standard Model prediction. The precise measurement of this decay mode provides a basic tool for the timing calibration, a normalization channel, and a strong quality check of the complete MEG experiment in the search for $渭^+ \to e^+纬$ process. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1312.3217v3-abstract-full').style.display = 'none'; document.getElementById('1312.3217v3-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 March, 2016; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 11 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">8 pages, 7 figures. Added an introduction to NLO calculation which was recently calculated. Published version</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Eur. Phys. J. C (2016) 76:108 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1310.7681">arXiv:1310.7681</a> <span> [<a href="https://arxiv.org/pdf/1310.7681">pdf</a>, <a href="https://arxiv.org/format/1310.7681">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-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/10.1103/PhysRevA.90.023404">10.1103/PhysRevA.90.023404 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Analysis of strong-field enhanced ionization of molecules using Bohmian trajectories </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Sawada%2C+R">Ryohto Sawada</a>, <a href="/search/physics?searchtype=author&query=Sato%2C+T">Takeshi Sato</a>, <a href="/search/physics?searchtype=author&query=Ishikawa%2C+K+L">Kenichi L. Ishikawa</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="1310.7681v4-abstract-short" style="display: inline;"> We theoretically investigate the mechanism of enhanced ionization in two-electron molecules by analyzing Bohmian trajectories for a one-dimensional H2 in an intense laser field. We identify both types of ionizing trajectories corresponding to the ejection from the up-field and down-field cores. The trajectories of the two electrons are correlated with each other in the former while correlation is… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1310.7681v4-abstract-full').style.display = 'inline'; document.getElementById('1310.7681v4-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1310.7681v4-abstract-full" style="display: none;"> We theoretically investigate the mechanism of enhanced ionization in two-electron molecules by analyzing Bohmian trajectories for a one-dimensional H2 in an intense laser field. We identify both types of ionizing trajectories corresponding to the ejection from the up-field and down-field cores. The trajectories of the two electrons are correlated with each other in the former while correlation is negligible in the latter. The contributions from the two ionization types, though depending on laser intensity and internuclear distance, are comparable to each other. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1310.7681v4-abstract-full').style.display = 'none'; document.getElementById('1310.7681v4-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> 21 August, 2014; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 29 October, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 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">9 pages, 9 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/1303.2348">arXiv:1303.2348</a> <span> [<a href="https://arxiv.org/pdf/1303.2348">pdf</a>, <a href="https://arxiv.org/ps/1303.2348">ps</a>, <a href="https://arxiv.org/format/1303.2348">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/10.1140/epjc/s10052-013-2365-2">10.1140/epjc/s10052-013-2365-2 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The MEG detector for $渭+\to e+纬$ decay search </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Adam%2C+J">J. Adam</a>, <a href="/search/physics?searchtype=author&query=Bai%2C+X">X. Bai</a>, <a href="/search/physics?searchtype=author&query=Baldini%2C+A+M">A. M. Baldini</a>, <a href="/search/physics?searchtype=author&query=Baracchini%2C+E">E. Baracchini</a>, <a href="/search/physics?searchtype=author&query=Bemporad%2C+C">C. Bemporad</a>, <a href="/search/physics?searchtype=author&query=Boca%2C+G">G. Boca</a>, <a href="/search/physics?searchtype=author&query=Cattaneo%2C+P+W">P. W. Cattaneo</a>, <a href="/search/physics?searchtype=author&query=Cavoto%2C+G">G. Cavoto</a>, <a href="/search/physics?searchtype=author&query=Cei%2C+F">F. Cei</a>, <a href="/search/physics?searchtype=author&query=Cerri%2C+C">C. Cerri</a>, <a href="/search/physics?searchtype=author&query=Corbo%2C+M">M. Corbo</a>, <a href="/search/physics?searchtype=author&query=Curalli%2C+N">N. Curalli</a>, <a href="/search/physics?searchtype=author&query=De+Bari%2C+A">A. De Bari</a>, <a href="/search/physics?searchtype=author&query=De+Gerone%2C+M">M. De Gerone</a>, <a href="/search/physics?searchtype=author&query=Del+Frate%2C+L">L. Del Frate</a>, <a href="/search/physics?searchtype=author&query=Doke%2C+S">S. Doke</a>, <a href="/search/physics?searchtype=author&query=Dussoni%2C+S">S. Dussoni</a>, <a href="/search/physics?searchtype=author&query=Egger%2C+J">J. Egger</a>, <a href="/search/physics?searchtype=author&query=Fratini%2C+K">K. Fratini</a>, <a href="/search/physics?searchtype=author&query=Fujii%2C+Y">Y. Fujii</a>, <a href="/search/physics?searchtype=author&query=Galli%2C+L">L. Galli</a>, <a href="/search/physics?searchtype=author&query=Galeotti%2C+S">S. Galeotti</a>, <a href="/search/physics?searchtype=author&query=Gallucci%2C+G">G. Gallucci</a>, <a href="/search/physics?searchtype=author&query=Gatti%2C+F">F. Gatti</a>, <a href="/search/physics?searchtype=author&query=Golden%2C+B">B. Golden</a> , et al. (51 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="1303.2348v4-abstract-short" style="display: inline;"> The MEG (Mu to Electron Gamma) experiment has been running at the Paul Scherrer Institut (PSI), Switzerland since 2008 to search for the decay \meg\ by using one of the most intense continuous $渭^+$ beams in the world. This paper presents the MEG components: the positron spectrometer, including a thin target, a superconducting magnet, a set of drift chambers for measuring the muon decay vertex and… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1303.2348v4-abstract-full').style.display = 'inline'; document.getElementById('1303.2348v4-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1303.2348v4-abstract-full" style="display: none;"> The MEG (Mu to Electron Gamma) experiment has been running at the Paul Scherrer Institut (PSI), Switzerland since 2008 to search for the decay \meg\ by using one of the most intense continuous $渭^+$ beams in the world. This paper presents the MEG components: the positron spectrometer, including a thin target, a superconducting magnet, a set of drift chambers for measuring the muon decay vertex and the positron momentum, a timing counter for measuring the positron time, and a liquid xenon detector for measuring the photon energy, position and time. The trigger system, the read-out electronics and the data acquisition system are also presented in detail. The paper is completed with a description of the equipment and techniques developed for the calibration in time and energy and the simulation of the whole apparatus. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1303.2348v4-abstract-full').style.display = 'none'; document.getElementById('1303.2348v4-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, 2013; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 10 March, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 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">59 pages, 90 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Eur. Phys. J. C, 73 (2013) 2365 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1303.0754">arXiv:1303.0754</a> <span> [<a href="https://arxiv.org/pdf/1303.0754">pdf</a>, <a href="https://arxiv.org/ps/1303.0754">ps</a>, <a href="https://arxiv.org/format/1303.0754">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="Instrumentation and Detectors">physics.ins-det</span> </div> </div> <p class="title is-5 mathjax"> New constraint on the existence of the mu+-> e+ gamma decay </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=MEG+Collaboration"> MEG Collaboration</a>, <a href="/search/physics?searchtype=author&query=Adam%2C+J">J. Adam</a>, <a href="/search/physics?searchtype=author&query=Bai%2C+X">X. Bai</a>, <a href="/search/physics?searchtype=author&query=Baldini%2C+A+M">A. M. Baldini</a>, <a href="/search/physics?searchtype=author&query=Baracchini%2C+E">E. Baracchini</a>, <a href="/search/physics?searchtype=author&query=Bemporad%2C+C">C. Bemporad</a>, <a href="/search/physics?searchtype=author&query=Boca%2C+G">G. Boca</a>, <a href="/search/physics?searchtype=author&query=Cattaneo%2C+P+W">P. W. Cattaneo</a>, <a href="/search/physics?searchtype=author&query=Cavoto%2C+G">G. Cavoto</a>, <a href="/search/physics?searchtype=author&query=Cei%2C+F">F. Cei</a>, <a href="/search/physics?searchtype=author&query=Cerri%2C+C">C. Cerri</a>, <a href="/search/physics?searchtype=author&query=de+Bari%2C+A">A. de Bari</a>, <a href="/search/physics?searchtype=author&query=De+Gerone%2C+M">M. De Gerone</a>, <a href="/search/physics?searchtype=author&query=Doke%2C+T">T. Doke</a>, <a href="/search/physics?searchtype=author&query=Dussoni%2C+S">S. Dussoni</a>, <a href="/search/physics?searchtype=author&query=Egger%2C+J">J. Egger</a>, <a href="/search/physics?searchtype=author&query=Fratini%2C+K">K. Fratini</a>, <a href="/search/physics?searchtype=author&query=Fujii%2C+Y">Y. Fujii</a>, <a href="/search/physics?searchtype=author&query=Galli%2C+L">L. Galli</a>, <a href="/search/physics?searchtype=author&query=Gallucci%2C+G">G. Gallucci</a>, <a href="/search/physics?searchtype=author&query=Gatti%2C+F">F. Gatti</a>, <a href="/search/physics?searchtype=author&query=Golden%2C+B">B. Golden</a>, <a href="/search/physics?searchtype=author&query=Grassi%2C+M">M. Grassi</a>, <a href="/search/physics?searchtype=author&query=Graziosi%2C+A">A. Graziosi</a>, <a href="/search/physics?searchtype=author&query=Grigoriev%2C+D+N">D. N. Grigoriev</a> , et al. (49 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="1303.0754v2-abstract-short" style="display: inline;"> The analysis of a combined data set, totaling 3.6 \times 10^14 stopped muons on target, in the search for the lepton flavour violating decay mu^+ -> e^+ gamma is presented. The data collected by the MEG experiment at the Paul Scherrer Institut show no excess of events compared to background expectations and yield a new upper limit on the branching ratio of this decay of 5.7 \times 10^-13 (90% conf… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1303.0754v2-abstract-full').style.display = 'inline'; document.getElementById('1303.0754v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1303.0754v2-abstract-full" style="display: none;"> The analysis of a combined data set, totaling 3.6 \times 10^14 stopped muons on target, in the search for the lepton flavour violating decay mu^+ -> e^+ gamma is presented. The data collected by the MEG experiment at the Paul Scherrer Institut show no excess of events compared to background expectations and yield a new upper limit on the branching ratio of this decay of 5.7 \times 10^-13 (90% confidence level). This represents a four times more stringent limit than the previous world best limit set by MEG. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1303.0754v2-abstract-full').style.display = 'none'; document.getElementById('1303.0754v2-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> 23 April, 2013; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 4 March, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 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">5 pages, 3 figures, a version accepted in Phys. Rev. Lett</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1301.7225">arXiv:1301.7225</a> <span> [<a href="https://arxiv.org/pdf/1301.7225">pdf</a>, <a href="https://arxiv.org/format/1301.7225">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> <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"> MEG Upgrade Proposal </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Baldini%2C+A+M">A. M. Baldini</a>, <a href="/search/physics?searchtype=author&query=Cei%2C+F">F. Cei</a>, <a href="/search/physics?searchtype=author&query=Cerri%2C+C">C. Cerri</a>, <a href="/search/physics?searchtype=author&query=Dussoni%2C+S">S. Dussoni</a>, <a href="/search/physics?searchtype=author&query=Galli%2C+L">L. Galli</a>, <a href="/search/physics?searchtype=author&query=Grassi%2C+M">M. Grassi</a>, <a href="/search/physics?searchtype=author&query=Nicol%C3%B2%2C+D">D. Nicol貌</a>, <a href="/search/physics?searchtype=author&query=Raffaelli%2C+F">F. Raffaelli</a>, <a href="/search/physics?searchtype=author&query=Sergiampietri%2C+F">F. Sergiampietri</a>, <a href="/search/physics?searchtype=author&query=Signorelli%2C+G">G. Signorelli</a>, <a href="/search/physics?searchtype=author&query=Tenchini%2C+F">F. Tenchini</a>, <a href="/search/physics?searchtype=author&query=Bagliani%2C+D">D. Bagliani</a>, <a href="/search/physics?searchtype=author&query=De+Gerone%2C+M">M. De Gerone</a>, <a href="/search/physics?searchtype=author&query=Gatti%2C+F">F. Gatti</a>, <a href="/search/physics?searchtype=author&query=Baracchini%2C+E">E. Baracchini</a>, <a href="/search/physics?searchtype=author&query=Fujii%2C+Y">Y. Fujii</a>, <a href="/search/physics?searchtype=author&query=Iwamoto%2C+T">T. Iwamoto</a>, <a href="/search/physics?searchtype=author&query=Kaneko%2C+D">D. Kaneko</a>, <a href="/search/physics?searchtype=author&query=Mori%2C+T">T. Mori</a>, <a href="/search/physics?searchtype=author&query=Nishimura%2C+M">M. Nishimura</a>, <a href="/search/physics?searchtype=author&query=Ootani%2C+W">W. Ootani</a>, <a href="/search/physics?searchtype=author&query=Sawada%2C+R">R. Sawada</a>, <a href="/search/physics?searchtype=author&query=Uchiyama%2C+Y">Y. Uchiyama</a>, <a href="/search/physics?searchtype=author&query=Boca%2C+G">G. Boca</a>, <a href="/search/physics?searchtype=author&query=Cattaneo%2C+P+W">P. W. Cattaneo</a> , et al. (43 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="1301.7225v2-abstract-short" style="display: inline;"> We propose the continuation of the MEG experiment to search for the charged lepton flavour violating decay (cLFV) 渭\to e 纬, based on an upgrade of the experiment, which aims for a sensitivity enhancement of one order of magnitude compared to the final MEG result, down to the $6 \times 10^{-14}$ level. The key features of this new MEG upgrade are an increased rate capability of all detectors to ena… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1301.7225v2-abstract-full').style.display = 'inline'; document.getElementById('1301.7225v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1301.7225v2-abstract-full" style="display: none;"> We propose the continuation of the MEG experiment to search for the charged lepton flavour violating decay (cLFV) 渭\to e 纬, based on an upgrade of the experiment, which aims for a sensitivity enhancement of one order of magnitude compared to the final MEG result, down to the $6 \times 10^{-14}$ level. The key features of this new MEG upgrade are an increased rate capability of all detectors to enable running at the intensity frontier and improved energy, angular and timing resolutions, for both the positron and photon arms of the detector. On the positron-side a new low-mass, single volume, high granularity tracker is envisaged, in combination with a new highly segmented, fast timing counter array, to track positron from a thinner stopping target. The photon-arm, with the largest liquid xenon (LXe) detector in the world, totalling 900 l, will also be improved by increasing the granularity at the incident face, by replacing the current photomultiplier tubes (PMTs) with a larger number of smaller photosensors and optimizing the photosensor layout also on the lateral faces. A new DAQ scheme involving the implementation of a new combined readout board capable of integrating the diverse functions of digitization, trigger capability and splitter functionality into one condensed unit, is also under development. We describe here the status of the MEG experiment, the scientific merits of the upgrade and the experimental methods we plan to use. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1301.7225v2-abstract-full').style.display = 'none'; document.getElementById('1301.7225v2-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 February, 2013; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 30 January, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 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">A. M. Baldini and T. Mori Spokespersons. Research proposal submitted to the Paul Scherrer Institute Research Committee for Particle Physics at the Ring Cyclotron. 131 Pages</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1102.0106">arXiv:1102.0106</a> <span> [<a href="https://arxiv.org/pdf/1102.0106">pdf</a>, <a href="https://arxiv.org/format/1102.0106">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/10.1140/epjp/i2011-11060-6">10.1140/epjp/i2011-11060-6 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The Architecture of MEG Simulation and Analysis Software </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Cattaneo%2C+P+W">Paolo W. Cattaneo</a>, <a href="/search/physics?searchtype=author&query=Cei%2C+F">Fabrizio Cei</a>, <a href="/search/physics?searchtype=author&query=Sawada%2C+R">Ryu Sawada</a>, <a href="/search/physics?searchtype=author&query=Schneebeli%2C+M">Matthias Schneebeli</a>, <a href="/search/physics?searchtype=author&query=Yamada%2C+S">Shuei Yamada</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="1102.0106v2-abstract-short" style="display: inline;"> MEG (Mu to Electron Gamma) is an experiment dedicated to search for the $渭^+ \rightarrow e^+纬$ decay that is strongly suppressed in the Standard Model but predicted in several Super Symmetric extensions of it at an accessible rate. MEG is a small-size experiment ($\approx 50-60$ physicists at any time) with a life span of about 10 years. The limited human resource available, in particular in the c… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1102.0106v2-abstract-full').style.display = 'inline'; document.getElementById('1102.0106v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1102.0106v2-abstract-full" style="display: none;"> MEG (Mu to Electron Gamma) is an experiment dedicated to search for the $渭^+ \rightarrow e^+纬$ decay that is strongly suppressed in the Standard Model but predicted in several Super Symmetric extensions of it at an accessible rate. MEG is a small-size experiment ($\approx 50-60$ physicists at any time) with a life span of about 10 years. The limited human resource available, in particular in the core offline group, emphasized the importance of reusing software and exploiting existing expertise. Great care has been devoted to provide a simple system that hides implementation details to the average programmer. That allowed many members of the collaboration to contribute to the development of the software of the experiment with limited programming skill. The offline software is based on two frameworks: {\bf REM} in FORTRAN 77 used for the event generation and detector simulation package {\bf GEM}, based on GEANT 3, and {\bf ROME} in C++ used in the readout simulation {\bf Bartender} and in the reconstruction and analysis program {\bf Analyzer}. Event display in the simulation is based on GEANT 3 graphic libraries and in the reconstruction on ROOT graphic libraries. Data are stored in different formats in various stage of the processing. The frameworks include utilities for input/output, database handling and format conversion transparent to the user. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1102.0106v2-abstract-full').style.display = 'none'; document.getElementById('1102.0106v2-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 June, 2011; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 1 February, 2011; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 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">Presented at the IEEE NSS Knoxville, 2010 Revised according to referee's remarks Accepted by European Physical Journal Plus</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Eur.Phys.J.Plus 126:60,2011 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/physics/0407033">arXiv:physics/0407033</a> <span> [<a href="https://arxiv.org/pdf/physics/0407033">pdf</a>, <a href="https://arxiv.org/ps/physics/0407033">ps</a>, <a href="https://arxiv.org/format/physics/0407033">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/10.1016/j.nima.2005.02.029">10.1016/j.nima.2005.02.029 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Absorption of Scintillation Light in a 100 $\ell$ Liquid Xenon$纬$ Ray Detector and Expected Detector Performance </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Baldini%2C+A">A. Baldini</a>, <a href="/search/physics?searchtype=author&query=Bemporad%2C+C">C. Bemporad</a>, <a href="/search/physics?searchtype=author&query=Cei%2C+F">F. Cei</a>, <a href="/search/physics?searchtype=author&query=Doke%2C+T">T. Doke</a>, <a href="/search/physics?searchtype=author&query=Grassi%2C+M">M. Grassi</a>, <a href="/search/physics?searchtype=author&query=Grebenuk%2C+A+A">A. A. Grebenuk</a>, <a href="/search/physics?searchtype=author&query=Grigoriev%2C+D+N">D. N. Grigoriev</a>, <a href="/search/physics?searchtype=author&query=Haruyama%2C+T">T. Haruyama</a>, <a href="/search/physics?searchtype=author&query=Kasami%2C+K">K. Kasami</a>, <a href="/search/physics?searchtype=author&query=Kikuchi%2C+J">J. Kikuchi</a>, <a href="/search/physics?searchtype=author&query=Maki%2C+A">A. Maki</a>, <a href="/search/physics?searchtype=author&query=Mashimo%2C+T">T. Mashimo</a>, <a href="/search/physics?searchtype=author&query=Mihara%2C+S">S. Mihara</a>, <a href="/search/physics?searchtype=author&query=Mitsuhashi%2C+T">T. Mitsuhashi</a>, <a href="/search/physics?searchtype=author&query=Mori%2C+T">T. Mori</a>, <a href="/search/physics?searchtype=author&query=Nicolo%60%2C+D">D. Nicolo`</a>, <a href="/search/physics?searchtype=author&query=Nishiguchi%2C+H">H. Nishiguchi</a>, <a href="/search/physics?searchtype=author&query=Ootani%2C+W">W. Ootani</a>, <a href="/search/physics?searchtype=author&query=Ozone%2C+K">K. Ozone</a>, <a href="/search/physics?searchtype=author&query=Papa%2C+A">A. Papa</a>, <a href="/search/physics?searchtype=author&query=Pazzi%2C+R">R. Pazzi</a>, <a href="/search/physics?searchtype=author&query=Ritt%2C+S">S. Ritt</a>, <a href="/search/physics?searchtype=author&query=Sawada%2C+R">R. Sawada</a>, <a href="/search/physics?searchtype=author&query=Sergiampietri%2C+F">F. Sergiampietri</a>, <a href="/search/physics?searchtype=author&query=Signorelli%2C+G">G. Signorelli</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="physics/0407033v1-abstract-short" style="display: inline;"> An 800L liquid xenon scintillation $纬$ ray detector is being developed for the MEG experiment which will search for $渭^+\to\mathrm{e}^+纬$ decay at the Paul Scherrer Institut. Absorption of scintillation light of xenon by impurities might possibly limit the performance of such a detector. We used a 100L prototype with an active volume of 372x372x496 mm$^3$ to study the scintillation light absorpt… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('physics/0407033v1-abstract-full').style.display = 'inline'; document.getElementById('physics/0407033v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="physics/0407033v1-abstract-full" style="display: none;"> An 800L liquid xenon scintillation $纬$ ray detector is being developed for the MEG experiment which will search for $渭^+\to\mathrm{e}^+纬$ decay at the Paul Scherrer Institut. Absorption of scintillation light of xenon by impurities might possibly limit the performance of such a detector. We used a 100L prototype with an active volume of 372x372x496 mm$^3$ to study the scintillation light absorption. We have developed a method to evaluate the light absorption, separately from elastic scattering of light, by measuring cosmic rays and $伪$ sources. By using a suitable purification technique, an absorption length longer than 100 cm has been achieved. The effects of the light absorption on the energy resolution are estimated by Monte Carlo simulation. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('physics/0407033v1-abstract-full').style.display = 'none'; document.getElementById('physics/0407033v1-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 July, 2004; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2004. </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 (eps). Submitted to Nucl. Instr. and Meth. A</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> UT-ICEPP 04-02 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nucl.Instrum.Meth. A545 (2005) 753-764 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/physics/0401072">arXiv:physics/0401072</a> <span> [<a href="https://arxiv.org/pdf/physics/0401072">pdf</a>, <a href="https://arxiv.org/ps/physics/0401072">ps</a>, <a href="https://arxiv.org/format/physics/0401072">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/10.1109/TDEI.2006.1657967">10.1109/TDEI.2006.1657967 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Liquid Xe scintillation calorimetry and Xe optical properties </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Baldini%2C+A">A. Baldini</a>, <a href="/search/physics?searchtype=author&query=Bemporad%2C+C">C. Bemporad</a>, <a href="/search/physics?searchtype=author&query=Cei%2C+F">F. Cei</a>, <a href="/search/physics?searchtype=author&query=Doke%2C+T">T. Doke</a>, <a href="/search/physics?searchtype=author&query=Grassi%2C+M">M. Grassi</a>, <a href="/search/physics?searchtype=author&query=Haruyama%2C+T">T. Haruyama</a>, <a href="/search/physics?searchtype=author&query=Mihara%2C+S">S. Mihara</a>, <a href="/search/physics?searchtype=author&query=Mori%2C+T">T. Mori</a>, <a href="/search/physics?searchtype=author&query=Nicol%C3%B2%2C+D">D. Nicol貌</a>, <a href="/search/physics?searchtype=author&query=Nishiguchi%2C+H">H. Nishiguchi</a>, <a href="/search/physics?searchtype=author&query=Ootani%2C+W">W. Ootani</a>, <a href="/search/physics?searchtype=author&query=Ozone%2C+K">K. Ozone</a>, <a href="/search/physics?searchtype=author&query=Papa%2C+A">A. Papa</a>, <a href="/search/physics?searchtype=author&query=Pazzi%2C+R">R. Pazzi</a>, <a href="/search/physics?searchtype=author&query=Sawada%2C+R">R. Sawada</a>, <a href="/search/physics?searchtype=author&query=Sergiampietri%2C+F">F. Sergiampietri</a>, <a href="/search/physics?searchtype=author&query=Signorelli%2C+G">G. Signorelli</a>, <a href="/search/physics?searchtype=author&query=Suzuki%2C+S">S. Suzuki</a>, <a href="/search/physics?searchtype=author&query=Terasawa%2C+K">K. Terasawa</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="physics/0401072v1-abstract-short" style="display: inline;"> The optical properties of LXe in the vacuum ultra violet (VUV), determining the performance of a scintillation calorimeter, are discussed in detail. The available data, measured in a wider spectral region from visible to UV light, and in a large range of Xe densities, from gas to liquid, are examined. It is shown that this information can be used for deriving the LXe optical properties in the VU… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('physics/0401072v1-abstract-full').style.display = 'inline'; document.getElementById('physics/0401072v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="physics/0401072v1-abstract-full" style="display: none;"> The optical properties of LXe in the vacuum ultra violet (VUV), determining the performance of a scintillation calorimeter, are discussed in detail. The available data, measured in a wider spectral region from visible to UV light, and in a large range of Xe densities, from gas to liquid, are examined. It is shown that this information can be used for deriving the LXe optical properties in the VUV. A comparison is made with the few direct measurements in LXe for VUV light resulting from the LXe excitation by ionizing particles. A useful relation is obtained which connects the Rayleigh scattering length to the refractive index in LXe. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('physics/0401072v1-abstract-full').style.display = 'none'; document.getElementById('physics/0401072v1-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> 15 January, 2004; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2004. </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, 12 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> IEEE Trans.Dielectr.Electr.Insul. 13 (2006) 547-555 </p> </li> </ol> <div class="is-hidden-tablet">  <span class="help" 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