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arXiv 2012.09474hep-ph
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介质中中微子的色散

Dispersion of neutrinos in a medium

Ki-Young Choi, Eung Jin Chun, Jongkuk Kim

摘要:

本文分析了Weyl或Majorana中微子和Dirac中微子在复杂标量介质中的色散关系,介质与中微子通过汤川耦合相互作用。它们是通过微扰计算在不同的极限代表不同的物理情况,其中一些允许介质诱导的中微子振荡发生。值得注意的是,在非相对论极限下,马约拉纳或狄拉克中微子的特殊色散关系出现不同的情况。这对标量暗物质与中微子耦合的宇宙学场景提供了一个令人不快的限制。目前,通过天体物理中微子观测,模型参数空间受到中微子与暗物质散射的约束。

英文摘要:

We analyze the dispersion relations of Weyl or Majorana, and Dirac neutrinos in a complex scalar medium which interacts with the neutrinos through Yukawa couplings. They are solved by perturbative calculation in various limits representing different physical situations, some of which allow the medium-induced neutrino oscillation to occur. Remarkably, peculiar dispersion relations arise differently for Majorana or Dirac neutrinos in the non-relativistic limit. This provides an unpleasant restriction on the cosmological scenario of a scalar dark matter coupling to neutrinos. At present, the model parameter space is constrained by the neutrino scattering with dark matter through astrophysical neutrino observations.

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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