Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2009-08-21
Int.J.Mod.Phys.A25:4221-4237,2010
Physics
High Energy Physics
High Energy Physics - Phenomenology
22 pages, accepted for publication in International Journal of Modern Physics A
Scientific paper
10.1142/S0217751X10050366
Considering the mechanism of dissipative slow-roll that has been used in warm inflation scenario, we show that dissipation may alter usual cosmological scenarios associated with SUSY-flat directions. We mainly consider SUSY-flat directions that have strong interactions with non-flat directions and may cause strong dissipation both in thermal and non-thermal backgrounds. An example is the Affleck-Dine mechanism in which dissipation may create significant (both qualitative and quantitative) discrepancies between the conventional scenario and the dissipative one. We also discuss several mechanisms of generating curvature perturbations in which the dissipative field, which is distinguished from the inflaton field, can be used as the source of cosmological perturbations. Considering the Morikawa-Sasaki dissipative coefficient, the damping caused by the dissipation may be significant for many MSSM flat directions even if the dissipation is far from thermal equilibrium.
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