Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2006-10-11
JCAP 0706:019,2007
Physics
High Energy Physics
High Energy Physics - Phenomenology
33 pages, 5 figures, uses JHEP3.cls, final version published in JCAP
Scientific paper
10.1088/1475-7516/2007/06/019
We consider low scale slow roll inflation driven by the gauge invariant flat directions {\bf udd} and {\bf LLe} of the Minimally Supersymmetric Standard Model at the vicinity of a saddle point of the scalar potential. We study the stability of saddle point and the slow roll regime by considering radiative and supergravity corrections. The latter are found to be harmless, but the former require a modest finetuning of the saddle point condition. We show that while the inflaton decays almost instantly, full thermalization occurs late, typically at a temperature $T\approx 10^{7}$ GeV, so that there is no gravitino problem. We also compute the renormalization group running of the inflaton mass and relate it to slepton masses that may be within the reach of LHC and could be precisely determined in a future Linear Collider experiment.
Allahverdi Rouzbeh
Enqvist Kari
Garcia-Bellido Juan
Jokinen Asko
Mazumdar Anupam
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