Strong cosmological constraints on the neutrino magnetic moment
arXiv (Cornell University)(2022)
摘要
A sizable magnetic moment for neutrinos would be evidence of exotic physics. In the early Universe, left-handed neutrinos with a magnetic moment would interact with electromagnetic fields in the primordial plasma, flipping their helicity and producing a population of right-handed (RH) neutrinos. In this work, we present a new calculation of the production rate of RH neutrinos in a multi-component primordial plasma and quantify their contribution to the total energy density of relativistic species at early times, stressing the implications of the dependence on the initial time for production. Our results improve the previous cosmological limits by almost two orders of magnitudes. Prospects for upcoming cosmological experiments are also discussed.
更多查看译文
关键词
strong cosmological constraints
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要