论文标题
彗星的中微子互动
Neutrino interactions at COMET
论文作者
论文摘要
在核存在下，对穆恩向电子的相干性中性s依率的实验性搜索旨在探究违反带电的Lepton风味的可能性。 J-PARC的彗星实验就是这样的设置，它提供了前所未有的统计范围，单个事件敏感性降至$ \ Mathcal {O} $（$ \ Mathrm {10^{ - 17}}} $）。它的后继实验 - 计划作为最后阶段的棱镜，预计将通过两个数量级进一步限制。绑定次数的标准模型衰减中的电子被认为是检测这些转换电子的最强大的物理背景。考虑到高阻止的彗星和棱镜统计，衰减中微子与核质子的当前相互作用的速率也不可忽略。在这项工作中，我们对彗星设置中电子抗瑞氏菌与Al靶质子的相互作用进行了预期的正电子事件速率计算。大约$ \ mathrm {7 \ pm1} $这样的$ \ mathrm {e^{+}} $ events per $ \ mathrm {10^{18}} $ toped muons。
The experimental search for coherent neutrinoless conversion of muon to electron in the presence of a nucleus, aims to probe the possibility of charged lepton flavour violation. The COMET experiment at J-PARC is one such setup offering unprecedented statistical reach, with single event sensitivities down to $\mathcal{O}$ ($\mathrm{10^{-17}}$). Its successor experiment - PRISM, planned as the final stage, is expected to take this bound further down by two orders of magnitude. The electrons from standard model decay of bound muons are considered the most formidable physics background to the detection of these conversion electrons. Keeping in view the high stopped muon statistics for COMET and PRISM, the rate of charged current interaction of decay neutrinos with nuclear protons is also non-negligible. In this work, we perform a calculation of the positron event rates expected due to interactions of electron antineutrinos with Al target protons in the COMET setup. About $\mathrm{7\pm1}$ such $\mathrm{e^{+}}$ events per $\mathrm{10^{18}}$stopped muons are expected.
