Aspects of warm-flat directions - High Energy Physics - PhenomenologyReport as inadecuate

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Abstract: Considering the mechanism of dissipative slow-roll that has been used in warminflation scenario, we show that dissipation may alter usual cosmologicalscenarios associated with SUSY-flat directions. We mainly consider SUSY-flatdirections that have strong interactions with non-flat directions and may causestrong dissipation both in thermal and non-thermal backgrounds. An example isthe Affleck-Dine mechanism in which dissipation may create significant bothqualitative and quantitative discrepancies between the conventional scenarioand the dissipative one. We also discuss several mechanisms of generatingcurvature perturbations in which the dissipative field, which is distinguishedfrom the inflaton field, can be used as the source of cosmologicalperturbations. Considering the Morikawa-Sasaki dissipative coefficient, thedamping caused by the dissipation may be significant for many MSSM flatdirections even if the dissipation is far from thermal equilibrium.

Author: Tomohiro Matsuda


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