arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2404.17166hep-phnucl-th
收藏

利用非弹性 $\mu\rightarrow e$ 转换区分带电轻子味破坏情景

Distinguishing charged lepton flavor violation scenarios with inelastic $μ\rightarrow e$ conversion

W. C. Haxton, Evan Rule

AI总结:

本研究提出利用 Mu2e 和 COMET 中 $^{27}$Al 靶上的非弹性 $\mu\rightarrow e$ 转换约束 CLFV,并通过扩展非相对论 EFT 与核响应计算揭示其对新物理算符的补充探测能力。

摘要:

Mu2e 和 COMET 实验预计将把带电轻子味破坏(CLFV)的现有限制提高约四个数量级。$\mu\rightarrow e$ 转换实验通常针对无核激发产生的电子进行优化,因为这可使电子能量最大化,并使来自 μ 子自由衰变的本底最小化。本文论证,鉴于 Mu2e 和 COMET 选择的 $^{27}$Al 靶及其预期本底,它们将能够从非弹性 $\mu\rightarrow e$ 转换中提取关于 CLFV 的额外约束。我们描述了若干 CLFV 情景,其中非弹性 CLFV 可在转换电子的近端点能谱中诱发可测量的畸变,包括某些贡献算符无法在弹性 $\mu\rightarrow e$ 转换中被探测的情形。我们扩展了弹性 $\mu\rightarrow e$ 转换的非相对论 EFT 处理,纳入非弹性过程所需的新核算符,计算了相关核响应函数,并描述了若干新物理情景,其中非弹性过程可提供关于 CLFV 的额外信息。

英文摘要:

The Mu2e and COMET experiments are expected to improve existing limits on charged lepton flavor violation (CLFV) by roughly four orders of magnitude. $μ\rightarrow e$ conversion experiments are typically optimized for electrons produced without nuclear excitation, as this maximizes the electron energy and minimizes backgrounds from the free decay of the muon. Here we argue that Mu2e and COMET will be able to extract additional constraints on CLFV from inelastic $μ\rightarrow e$ conversion, given the $^{27}$Al target they have chosen and backgrounds they anticipate. We describe CLFV scenarios in which inelastic CLFV can induce measurable distortions in the near-endpoint spectrum of conversion electrons, including cases where certain contributing operators cannot be probed in elastic $μ\rightarrow e$ conversion. We extend the nonrelativistic EFT treatment of elastic $μ\rightarrow e$ conversion to include the new nuclear operators needed for the inelastic process, evaluate the associated nuclear response functions, and describe several new-physics scenarios where the inelastic process can provide additional information on CLFV.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑