<<<<<<<<<<<<<<<<<< CRC News 2023 年 10月19日 >>>>>>>>>>>>>>>>>>>> CRC 会員各位 CRC 事務局 ****** ****** 10月20日(金)16時(日本時間)から、ミュー粒子稀崩壊mu->e+gammaを探索するMEG II実験の最初の結果を報告するセミナー(zoom)を開催いたします。 本セミナーは日本とスイスのミューオン・中性子技術交流研究会「BRIDGE」(https://indico.psi.ch/event/14832/)の開催期間中に行います。 奮ってご参加下さい。 また、関係者へのご周知もよろしくお願いいたします。 ——————————————————————————————————————————————— This is to announce a special seminar on the first result of the MEG II experiment. The seminar will be given as a part of the program of the BRIDGE Workshop in Paul Scherrer Institute (PSI). https://indico.psi.ch/event/14832/contributions/46280/ Date & time: Oct. 20th 9:00-10:00am (CEST) Place: zoom:https://psich.zoom.us/j/65458100158 (the recording of the seminar will be available later.) Speaker: Prof. Toshinori Mori (ICEPP, Univ. of Tokyo) Title: The First Result of MEG II on Search for mu -> e + gamma Abstract: The MEG II Collaboration will present the first result of its search for the flavor-violating muon decay, mu -> e + gamma. MEG II, the upgrade of MEG, started physics data taking in late 2021 and is continuing to accumulate data to search for the lepton-flavor-violating muon decay with a target sensitivity of 6 x 10^-14 at 90% C.L., i.e., an order of magnitude improvement over MEG. The upgraded detectors (the 2.7-ton liquid xenon photon detector, the cylindrical drift chamber, and the pixelated timing counters), together with the new radiative decay counter, provide larger acceptance, increased granularity and better resolutions, allowing to deal with higher background rates than the previous MEG detectors. The result of the analysis of the data taken in 2021, which has a sensitivity close to the final MEG result, will be presented. By today, more than 10 times larger data sample than 2021 has already been accumulated. Future plan of the experiment will also be discussed. ——————————————————————————————————————————————— 大谷 航 東京大学素粒子物理国際研究センター ======================================================