| 书目名称 | Search for the Decay K_L → π^0
uar{
u} at the J-PARC KOTO Experiment | | 编辑 | Kota Nakagiri | | 视频video | | | 概述 | Nominated as an outstanding Ph.D. thesis by Kyoto University, Japan.Presents an analysis of the world‘s best upper limit for the branching fraction of the KL?p0?? decay at the J-PARC KOTO experiment.D | | 丛书名称 | Springer Theses | | 图书封面 |  | | 描述 | .This book reports on a new result from the .K.L.→.π.0.ν.ν. search at the J-PARC KOTO experiment, which sets an upper limit of 3×10.-9. for the branching fraction of the decay at the 90% confidence level, improving the previous best limit by an order of magnitude. To explain the matter–antimatter asymmetry in the universe, still unknown new physics beyond the standard model (SM) that breaks CP symmetry is necessary. The rare decay of a long-lived neutral K meson, .K.L.→.π.0.ν.ν., is a CP-violating decay. It is an excellent probe to search for new physics because new physics can contribute to the decay and change its branching fraction, while the SM is as small as 3×10.-11.. However, it is extremely difficult to search for because all of the decay products are neutral and two neutrinos are undetectable. The .K.L.→.π.0.ν.ν. signal is identifiedby measuring two photons from a .π.0. with a calorimeter and confirming the absence of any other detectable particles with hermetic veto counters. The book contributes to the analysis of neutron-induced backgrounds which were the dominant background sources in the search. For the background caused by two consecutive hadronic showers in the calo | | 出版日期 | Book 2020 | | 关键词 | CP-Violating Decay Process; Particle Physics; Flavor Physics; Kaon Physics; Rare Decay; J-PARC Accelerato | | 版次 | 1 | | doi | https://doi.org/10.1007/978-981-15-6422-2 | | isbn_softcover | 978-981-15-6424-6 | | isbn_ebook | 978-981-15-6422-2Series ISSN 2190-5053 Series E-ISSN 2190-5061 | | issn_series | 2190-5053 | | copyright | Springer Nature Singapore Pte Ltd. 2020 |
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发表于 2025-3-21 17:46:16
