Why the early Universe preferred the non-supersymmetric vacuum: part II

It was recently shown in hep-th/0610334 that in the context of the ISS modelswith a metastable supersymmetry breaking vacuum, thermal effects genericallydrive the Universe to the metastable vacuum even if it began after inflation inthe supersymmetry-preserving one. We continue this programme and specificallytake into account two new effects. First is the effect of the mass-gap of thegauge degrees of freedom in the confining supersymmetry preserving vacua, andsecond, is the effect of the back reaction of the MSSM sector on the SUSYbreaking ISS sector. It is shown that, even though the mass-gap isparametrically smaller than the <\phi> vevs, it drastically reduces thetemperature required for the Universe to be driven to the metastable vacuum:essentially any temperature larger than the supersymmetry breaking scale \mu issufficient. On the other hand we also find that any reasonable transmission ofSUSY breaking to the MSSM sector has no effect on the vacuum transitions to,and the stability of the SUSY breaking vacuum. We conclude that for thesemodels the early Universe does end up in the SUSY breaking vacuum.Comment: 15 pages, 6 figure