论文标题
Lepton数字在宇宙中微子背景中生存
lepton number survival in the cosmic neutrino background
论文作者
论文摘要
热爆炸模型预测了\ emph {宇宙中微子背景}的存在。 中微子的原始浴中的颗粒和抗颗粒的数量可能是不同的 - 在很早的时期发生的过程的记忆。 如果中微子是无质量的，那么一旦中微子冻结，这种不对称性就不会改变。 但是，在大量颗粒的情况下，不对称性不受保护定律的保护，并且可以通过对物质不均匀性的螺旋弹性散射擦除。 我们评估了这种旋转速度的速率，并证明如果存在遗物Lepton的不对称性，它将在地球邻里保持完整，以实现中性中微子质量的现实价值。
The Hot Big Bang model predicts the existence of a \emph{cosmic neutrino background}. The number of particles and anti-particles in this primordial bath of neutrinos can be different -- a memory of processes that took place at very early epochs. If neutrinos were massless, this asymmetry would not change once neutrinos froze out. However, in the case of massive particles, the asymmetry is not protected by conservation laws and can get erased via helicity-flipping scatterings off matter inhomogeneities. We evaluate this helicity-flipping rate and demonstrate that if relic lepton asymmetry ever existed, it would remain largely intact in the Earth's neighborhood for realistic values of neutrino masses.
