IMPLICATIONS OF A LIGHT STOP FOR THE SPONTANOUS CP BREAKING AT FINITE-TEMPERATURE IN A NONMINIMAL SUPERSYMMETRIC MODEL

被引:15
作者
COMELLI, D
PIETRONI, M
RIOTTO, A
机构
[1] DESY,THEORY GRP,D-22603 HAMBURG,GERMANY
[2] IST NAZL FIS NUCL,SEZ TRIESTE,I-34014 TRIESTE,ITALY
[3] IST NAZL FIS NUCL,SEZ PADUA,I-35100 PADUA,ITALY
[4] CSIC,INST ESTRUCTURA MAT,E-28006 MADRID,SPAIN
关键词
D O I
10.1016/0370-2693(94)01427-E
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We study the implications of a light stop for the spontaneous CP breaking at finite temperature in the Higgs sector of the Minimal Supersymmetric Standard Model with a gauge singlet. Assuming CP conservation at zero temperature, we show that the presence of a large mixing between the left- and the right-handed stops can trigger easily the spontaneous breaking of CP inside the bubbles nucleated during the electroweak phase transition. This allows to avoid the fine-tuning among the vacuum expectation values in the region of interest for the generation of the baryon asymmetry, namely the bubble walls, which has been recently analized.
引用
收藏
页码:207 / 213
页数:7
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