Bubbles in the supersymmetric standard model

Details Bubbles in the supersymmetric standard model Bubbles in the supersymmetric standard model

1998-01-12

arxiv.org/abs/hep-ph/9801272v1

Nucl.Phys. B526 (1998) 489-500

Physics

High Energy Physics

High Energy Physics - Phenomenology

18 pages, LateX + psfig, 6 figures

Scientific paper

10.1016/S0550-3213(98)00283-1

We compute the tunneling probability from the symmetric phase to the true vacuum, in the first order electroweak phase transition of the MSSM, and the corresponding Higgs profiles along the bubble wall. We use the resummed two-loop temperature-dependent effective potential, and pay particular attention to the light stop scenario, where the phase transition can be sufficiently strongly first order not to wipe off any previously generated baryon asymmetry. We compute the bubble parameters which are relevant for the baryogenesis mechanism: the wall thickness and $\Delta\beta$. The two-loop corrections provide important enhancement effects, with respect to the one-loop results, in the amount of baryon asymmetry.

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