论文标题
Mu2e运行I敏感性预测$μ^ - \ to e^ - $转换搜索铝
Mu2e Run I Sensitivity Projections for the Neutrinoless $μ^- \to e^-$ Conversion Search in Aluminum
论文作者
论文摘要
Fermilab的MU2E实验将搜索铝制核场中的中性s $μ^ - \ to e^ - $转化。 MU2E数据研究计划假定两个运行时间，即运行I和Run II，大约两年的关闭时间。本文介绍了预期的MU2E运行I搜索灵敏度的估计，其中包括对背景源，其预测的不确定性，分析程序的不确定性以及实验灵敏度的优化的详细讨论。预期的运行i $5σ$发现灵敏度为$ r_ {μe} = 1.2 \ times 10^{ - 15} $，总预期背景为$ 0.11 \ pm 0.03 $事件。在没有信号的情况下，预期的上限为$ r_ {μe} <6.2 \ times 10^{ - 16} $ 90％Cl。这代表了$ r_ {μe} <7 \ times 10^{ - 13} $在90 \％cl设置的$ r_ {μe} <7 \ times 10^{ - 13} $的当前实验极限的三个数量级改进。
The Mu2e experiment at Fermilab will search for the neutrinoless $μ^- \to e^-$ conversion in the field of an aluminum nucleus. The Mu2e data-taking plan assumes two running periods, Run I and Run II, separated by an approximately two-year-long shutdown. This paper presents an estimate of the expected Mu2e Run I search sensitivity and includes a detailed discussion of the background sources, uncertainties of their prediction, analysis procedures, and the optimization of the experimental sensitivity. The expected Run I $5 σ$ discovery sensitivity is $R_{μe} = 1.2 \times 10^{-15}$, with a total expected background of $0.11 \pm 0.03$ events. In the absence of a signal, the expected upper limit is $R_{μe} < 6.2 \times 10^{-16}$ at 90% CL. This represents a three order of magnitude improvement over the current experimental limit of $R_{μe} < 7 \times 10^{-13}$ at 90\% CL set by the SINDRUM II experiment.
