ON THE BARYON, LEPTON-FLAVOR AND RIGHT-HANDED ELECTRON ASYMMETRIES OF THE UNIVERSE

被引:139
作者
CAMPBELL, BA
DAVIDSON, S
ELLIS, J
OLIVE, KA
机构
[1] UNIV CALIF BERKELEY, CTR PARTICLE ASTROPHYS, BERKELEY, CA 94720 USA
[2] UNIV MINNESOTA, SCH PHYS & ASTRON, MINNEAPOLIS, MN 55455 USA
[3] CERN, CH-1211 GENEVA 23, SWITZERLAND
基金
加拿大自然科学与工程研究理事会;
关键词
D O I
10.1016/0370-2693(92)91079-O
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Non-perturbative electroweak effects, in thermal equilibrium in the early universe, have the potential to erase the baryon asymmetry of the universe, unless it is encoded in a B-L asymmetry, or in some ''accidentally'' conserved quantity. We first consider the possibility that the BAU may be regenerated from lepton flavour asymmetries even when initially B-L=0. We show that provided some, but not all the lepton flavours are violated by DELTAL not-equal 0 interactions in equilibrium, the BAU may be regenerated without lepton mass effects. We next examine the possibility of encoding the baryon asymmetry in a primordial asymmetry for the right-handed electron, which due to its weak Yukawa interaction only comes into chemical equilibrium as the sphalerons are falling out of equilibrium. This would also raise the possibility of preserving an initial baryon asymmetry when B-L=0.
引用
收藏
页码:118 / 124
页数:7
相关论文
共 23 条