Relic neutrino asymmetry evolution from first principles
Relic neutrino asymmetry evolution from first principles
复制标题
遗迹中微子不对称从第一原理的演化
DOI：
10.1103/physrevd.59.113001
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发表时间：
1998
影响因子：
5
通讯作者：
Y. Wong
中科院分区：
文献类型：
--
作者：
N. Bell;R. Volkas;Y. Wong
利用双味活性-惰性中微子系统的精确量子动力学方程，系统地推导了残余中微子不对称性的近似演化方程。本文发展了一种扩展的绝热近似，它考虑了碰撞引起的退相干。讨论了退相干和再布居函数的精确和近似表达式。第一遍是在一个多味部分非相干振荡的精确治疗。
The exact quantum kinetic equations for a two-flavor active-sterile neutrino system are used to provide a systematic derivation of approximate evolution equations for the relic neutrino asymmetry. An extension of the adiabatic approximation for matter-affected neutrino oscillations is developed which incorporates decoherence due to collisions. Exact and approximate expressions for the decoherence and repopulation functions are discussed. A first pass is made at an exact treatment of multi-flavor partially incoherent oscillations.