标题： 轻子二重态的混合产生重子数不对称性 显示英文标题

标题： Baryogenesis from Mixing of Lepton Doublets

摘要： 研究表明，标准模型中轻子双态的混合可以对轻子不对称性产生显著贡献，这种不对称性是通过早期宇宙中右手中微子在有限温度下的衰变产生的。 在计算味混合相关性时，我们考虑了Yukawa相互作用和规范相互作用的影响。 我们将来自轻子双态混合的冻结不对称性与来自右手中微子混合和直接衰变的标准贡献进行比较。 当右手中微子之间的质量比为几倍时，来自轻子混合的不对称性相当大，而对于更大的层次结构，则会受到麦克斯韦抑制。 在简并右手中微子的情况（共振重子生成）和层次结构情况之间的中间范围内，轻子混合可以对轻子不对称性产生主要贡献。 显示英文摘要

摘要： It is shown that the mixing of lepton doublets of the Standard Model can yield sizeable contributions to the lepton asymmetry, that is generated through the decays of right-handed neutrinos at finite temperature in the early Universe. When calculating the flavour-mixing correlations, we account for the effects of Yukawa as well as of gauge interactions. We compare the freeze-out asymmetry from lepton-doublet mixing to the standard contributions from the mixing and direct decays of right-handed neutrinos. The asymmetry from lepton mixing is considerably large when the mass ratio between the right-handed neutrinos is of order of a few, while it becomes Maxwell-suppressed for larger hierarchies. For an intermediate range between the case of degenerate right-handed neutrinos (resonant Leptogenesis) and the hierarchical case, lepton mixing can yield the main contribution to the lepton asymmetry.