论文标题
在与准脱位中微子的冻结和冻结诱导的不同方法上
On different approaches to freeze-in and freeze-out leptogenesis with quasi-degenerate neutrinos
论文作者
论文摘要
我们比较了确定在产生和衰减准脱位中微子期间Lepton不对称产生的两种方法，即密度矩阵形式主义和最近的提案，该提案不涉及中微子数量密度的任何计数，并且基于在量子现场理论中插入中微子模型中的重新宣传传播器中的中微子基于中微子的中微子模型。我们在数值和分析上显示它们几乎是等效的，除了非常大的质量分裂的极限。以简单的标量玩具模型进行的比较有助于理解文献中讨论的几个问题。
We compare two approaches for determining the generation of lepton asymmetry during production and decay of quasi-degenerate neutrinos, namely the density matrix formalism and a recent proposal which does not involve any counting of neutrino number densities and is based on plugging the resummed propagator in a quantum field theory model for neutrino oscillations. We show numerically and analytically that they are almost equivalent except in the limit of very large mass splittings. The comparison, performed in a simple scalar toy model, helps to understand several issues that have been discussed in the literature.
