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arXiv 1102.1331hep-ph
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V+A相互作用下极化μ子的静止衰变

Polarized Muon Decay at Rest with V+A Interaction

W. Sobków, S. Ciechanowicz, M. Misiaszek

摘要:

本文分析了极化μ子静止衰变(PMDaR)和弹性中微子-电子散射(ENES),其中除了考虑标准V-A相互作用外,还考虑了非标准V+A相互作用。考虑狄拉克质量μ中微子和电子反中微子。此外,μ子中微子是横向极化的。这意味着出射的μ子中微子束是左、右手征μ子中微子的混合体,并且相对于产生面具有固定的横向自旋极化方向。我们发现μ子中微子的角能分布包含了标准V-A耦合和奇异V+A耦合之间的干涉项,它们与μ子中微子自旋极化的横向分量成正比。它们在无质量中微子的极限下并不消失,并且包含了检验CP破坏的相对相位。因此,它允许计算中微子通量和预期的事件数在ENES(检测过程)的标准模型预测和中微子左右混合的情况下。

英文摘要:

In this paper, we analyze the polarized muon decay at rest (PMDaR) and elastic neutrino-electron scattering (ENES) admitting the non-standard V+A interaction in addition to standard V-A interaction. Considerations are made for Dirac massive muon neutrino and electron antineutrino. Moreover, muon neutrinos are transversely polarized. It means that the outgoing muon-neutrino beam is a mixture of the left- and right-chirality muon neutrinos and has a fixed direction of transverse spin polarization with respect to production plane. We show that the angle-energy distribution of muon neutrinos contains the interference terms between the standard V-A and exotic V+A couplings, which are proportional to the transverse components of muon neutrino spin polarization. They do not vanish in a limit of massless neutrino and include the relative phases to test the CP violation. In consequence, it allows to calculate a neutrino flux and an expected event number in the ENES (detection process) both for the standard model prediction and the case of neutrino left-right mixture.

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。

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