Leptogenesis via collisions: leaking lepton number to the hidden sector.
Leptogenesis via collisions: leaking lepton number to the hidden sector.
复制标题
DOI：
10.1103/physrevlett.87.231304
复制
发表时间：
2001-07
影响因子：
8.6
通讯作者：
L. Bento;Z. Berezhiani
中科院分区：
文献类型：
--
作者：
L. Bento;Z. Berezhiani
我们提出了一种轻子发生机制，其中宇宙的非零B-L是在非平衡、轻子数和违反cp的散射过程中产生的，这些散射过程将普通粒子转化为某些隐藏扇区的粒子。特别地，我们考虑了由跷跷板机制的重Majorana中微子N介导的l phi- >l(')phi('),l macro(')phi（‘）过程，其中l和phi是普通轻子和希格斯双重子，l （’）， phi（'）是它们的隐藏对偶。即使再热温度远小于重中微子质量，这种轻生机制也是有效的。特别是，它可以低至10(9)GeV。
We propose a leptobaryogenesis mechanism in which the nonzero B-L of the Universe is produced in out-of-equilibrium, lepton number and CP-violating scattering processes that convert ordinary particles into particles of some hidden sector. In particular, we consider the processes l phi-->l(')phi('),l macro(')phi(') mediated by the heavy Majorana neutrinos N of the seesaw mechanism, where l and phi are ordinary lepton and Higgs doublets and l('), phi(') are their hidden counterparts. Such a leptogenesis mechanism is effective even if the reheat temperature is much smaller than the heavy neutrino masses. In particular, it can be as low as 10(9) GeV.