Damping rates in the MSSM and electroweak baryogenesis

Details Damping rates in the MSSM and electroweak baryogenesis Damping rates in the MSSM and electroweak baryogenesis

1998-09-25

arxiv.org/abs/hep-ph/9809529v1

Phys.Lett.B452:279-286,1999

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages LaTEX, 1 ps figure

Scientific paper

10.1016/S0370-2693(99)00169-0

We present an analysis of the thermalization rate of Higgsinos and winos based on the imaginary part of the two-point Green function in the {\it unbroken} phase of the MSSM. We use improved propagators including resummation of hard thermal loops and the thermalization rate is computed at the one-loop level in the high temperature approximation. We find that the damping is typically dominated by scattering with gauge bosons, resulting in a damping rate of about $\gamma_{\Ht}\simeq 0.025T$, $\gamma_{\Wt}\simeq 0.065T$. The contribution from scattering with scalars is relatively small. Implications for baryogenesis are also discussed.

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