Baryogenesis and the Thermalization Rate of Stop

الأصل · EN

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 tᵣ(T). We also give an estimate for the magnitude of the two-loop contributions which dominate the rate for small M tᵣ(T). If the stop is non-relativistic with M tᵣ(T)≫ T, thermalization takes place by decay and is very fast.