Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1994-10-05
Phys.Lett.B343:207-213,1995
Physics
High Energy Physics
High Energy Physics - Phenomenology
11 pages, DFPD/TH/51/94, 2 figures available upon e-mail request
Scientific paper
10.1016/0370-2693(94)01427-E
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.
Comelli Denis
Pietroni Massimo
Riotto Antonio
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