Baryogenesis and the Thermalization Rate of StopBaryogenesis and the Thermalization Rate of Stop

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 Author Enqvist, Kari ♦ Riotto, Antonio ♦ Vilja, Iiro Source arXiv.org Content type Text File Format PDF Date of Submission 1997-10-16 Language English
 Subject Domain (in DDC) Computer science, information & general works ♦ Natural sciences & mathematics ♦ Astronomy & allied sciences ♦ Physics Subject Keyword High Energy Physics - Phenomenology ♦ Astrophysics ♦ physics:astro-ph ♦ physics:hep-ph Abstract 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. Description Reference: Phys.Lett. B438 (1998) 273-280 Educational Use Research Learning Resource Type Article Page Count 11