Rare Kaon Decay Experiments

罕见的 Kaon 衰变实验

基本信息

批准号：
SAPPJ-2015-00041
负责人：
Bryman, Douglas
金额：
$ 10.78万
依托单位：
University of British Columbia
依托单位国家：
加拿大
项目类别：
Subatomic Physics Envelope - Project
财政年份：
2016
资助国家：
加拿大
起止时间：
2016-01-01 至 2017-12-31
项目状态：
已结题

来源：
https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=614426
关键词：
Rare Kaon Decay Experiments

项目摘要

High precision measurement of the ultra-rare kaon decay K+ to pi+ neutrino anti-neutrino (KPNN) at the CERN NA62 experiment will be one of the most incisive probes of quark flavor physics. The branching ratio is sensitive to many new physics models not accessible by other reactions which extend the Standard Model (SM) to solve its considerable problems. The SM prediction for the KPNN branching fraction is broadly recognized to be theoretically robust at the 5% level. Only a precious few accessible loop-dominated quark processes can be predicted with this level of certainty. The suppression of the KPNN branching fraction in the SM to the level 10-10 allows physics beyond the SM to contribute dramatically to the branching fraction with enhancements of up to factors of five above SM predictions. The certainty with which the SM contribution to KPNN can be predicted will permit a significant discovery potential for new physics with sensitivity unique in quark flavor physics and it allows probing of most models of new physics that couple to quarks within the reach of the LHC. Furthermore, a high precision measurement of KPNN is sensitive to many models of new physics with mass scales well beyond the direct reach of the LHC. NA62 expects to have sensitivity for observing 100 events at the SM level for KPNN covering most of the parameter space for new physics models to contribute. It will also study many other rare or forbidden reactions to search for dark matter, heavy sterile neutrinos, neutral pion decays, and radiative processes.

在CERN Na62实验中，超稀有的Kaon衰减K+ kaon衰减K+ kaon decay k+ to+ pi+中微子抗神经（KPNN）将是夸克风味物理学中最尖锐的探针之一。分支比对许多不受其他反应无法访问的新物理模型的敏感，这些反应扩展了标准模型（SM）以解决其大量问题。 KPNN分支部分的SM预测在5％的水平上广泛认为是稳健的。只能通过这种确定性来预测少数珍贵的循环主导的夸克过程。 SM中KPNN分支分支到10-10级的抑制使SM以外的物理可以为分支分数做出巨大贡献，并增强了高于SM预测的5个因素。可以预测SM对KPNN的贡献的确定性将使具有Quark风味物理学敏感性独特的新物理学具有重要的发现潜力，并允许探测大多数新物理学模型，这些新物理学夫妇可以将Quark Quarks在LHC达到范围内。此外，KPNN的高精度测量对许多新物理学模型敏感，其质量尺度远远超出了LHC的直接范围。 NA62预计将对KPNN的100个事件观察100个事件具有敏感性，以涵盖新物理模型的大部分参数空间。它还将研究许多其他罕见或禁止的反应，以寻找暗物质，沉重的无菌中微子，中性亲腐烂和辐射过程。