Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1997-10-16
Phys.Lett. B438 (1998) 273-280
Physics
High Energy Physics
High Energy Physics - Phenomenology
11 pages, LaTex, 3 figures
Scientific paper
10.1016/S0370-2693(98)00963-0
We take the first steps towards the complete computation of the thermalization rate of the supersymmetric particles involved in electroweak baryogenesis by computing the thermalization rate of the right-handed stop from the imainary part of the two-point Green function. We use improved propagators including resummation of hard thermal loops. The thermalization rate is computed at the one-loop level in the high temperature approximation as a function of $M_{\tilde t_R}(T)$. We also give an estimate for the magnitude of the two-loop contributions which dominate the rate for small $M_{\tilde t_R}(T)$. If the stop is non-relativistic with $M_{\tilde t_R}(T)\gg T$, thermalization takes place by decay and is very fast.
Enqvist Kari
Riotto Antonio
Vilja Iiro
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