The MSSM potential can have unphysical minima deeper than the physically acceptable one. We point out that their presence is quite generic in SO(10) unification with supergravity mediated soft terms. However, at least for moderate values of tan beta, the physically acceptable vacuum has a lifetime longer than the universe age. Furthermore, by discussing the evolution of the universe in an inflationary scenario, we show that the correct vacuum is the natural expectation, This is not the tendency in different cases of unphysical minima. Even in the SO(10) case, the weak assumptions necessary for this may prevent to use the <(nu)over tilde h(u)> direction for baryogenesis a la Affleck-Dine.
Charge and colour breaking minima and constraints on the MSSM parameters
STRUMIA, ALESSANDRO
1996-01-01
Abstract
The MSSM potential can have unphysical minima deeper than the physically acceptable one. We point out that their presence is quite generic in SO(10) unification with supergravity mediated soft terms. However, at least for moderate values of tan beta, the physically acceptable vacuum has a lifetime longer than the universe age. Furthermore, by discussing the evolution of the universe in an inflationary scenario, we show that the correct vacuum is the natural expectation, This is not the tendency in different cases of unphysical minima. Even in the SO(10) case, the weak assumptions necessary for this may prevent to use the <(nu)over tilde h(u)> direction for baryogenesis a la Affleck-Dine.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
