Further considerations on the CP asymmetry in heavy Majorana neutrino decays
Further considerations on the CP asymmetry in heavy Majorana neutrino decays
复制标题
对重马约拉纳中微子衰变CP不对称性的进一步思考
DOI：
10.1103/physrevd.58.113009
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发表时间：
1998
影响因子：
5
通讯作者：
E. Paschos
中科院分区：
文献类型：
--
作者：
M. Flanz;E. Paschos
在考虑幺正性约束的情况下，导出了重Majorana中微子衰变和散射的热力学方程。玻尔兹曼方程依赖于CP不对称参数，该参数包含自能和顶点校正。在热平衡时，由于CPT定理和幺正性约束，没有净轻子不对称性。我们明确表明，偏离热平衡产生轻子不对称性。
We work out the thermodynamic equations for the decays and scatterings of heavy Majorana neutrinos including the constraints from unitarity. The Boltzmann equations depend on the CP asymmetry parameter which contains both, a self-energy and a vertex correction. At thermal equilibrium there is no net lepton asymmetry due to the CPT theorem and the unitarity constraint. We show explicitly that deviations from thermal equilibrium create the lepton asymmetry.