Development of the electroweak phase transition and baryogenesis

Details Development of the electroweak phase transition and baryogenesis Development of the electroweak phase transition and baryogenesis

2000-06-15

arxiv.org/abs/hep-ph/0006177v2

Int.J.Mod.Phys. D9 (2000) 733-756

Physics

High Energy Physics

High Energy Physics - Phenomenology

26 pages, 7 figures; typos corrected, reference added

Scientific paper

10.1142/S0218271800000724

We investigate the evolution of the electroweak phase transition, using a one-Higgs effective potential that can be regarded as an approximation for the Minimal Supersymmetric Standard Model. The phase transition occurs in a small interval around a temperature T_t below the critical one. We calculate this temperature as a function of the parameters of the potential and of a damping coefficient related to the viscosity of the plasma. The parameters that are relevant for baryogenesis, such as the velocity and thickness of the walls of bubbles and the value of the Higgs field inside them, change significantly in the range of temperatures where the first-order phase transition can occur. However, we find that in the likely interval for T_t there is no significant variation of these parameters. Furthermore, the temperature T_t is in general not far below the temperature at which bubbles begin to nucleate.

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