Landscape, the Scale of SUSY Breaking, and Inflation

Details Landscape, the Scale of SUSY Breaking, and Inflation Landscape, the Scale of SUSY Breaking, and Inflation

2004-11-01

arxiv.org/abs/hep-th/0411011v5

JHEP 0412:004,2004

Physics

High Energy Physics

High Energy Physics - Theory

7 pages, 4 figs, revtex, typos corrected

Scientific paper

10.1088/1126-6708/2004/12/004

We argue that in the simplest version of the KKLT model, the maximal value of the Hubble constant during inflation cannot exceed the present value of the gravitino mass, H< m_{3/2}. This may have important implications for string cosmology and for the scale of the SUSY breaking in this model. If one wants to have inflation on high energy scale, one must develop phenomenological models with an extremely large gravitino mass. On the other hand, if one insists that the gravitino mass should be O(1 TeV), one will need to develop models with a very low scale of inflation. We show, however, that one can avoid these restrictions in a more general class of KKLT models based on the racetrack superpotential with more than one exponent. In this case one can combine a small gravitino mass and low scale of SUSY breaking with the high energy scale of inflation.

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