| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1853677 | Physics Letters B | 2007 | 6 Pages |
Abstract
It is shown that gravitinos with mass m3/2â¼0.1-1MeV may provide suitable cold dark matter candidates in scenarios of gauge mediated supersymmetry breaking (GMSB) under SO(10) grand unification coupled to supergravity, which accommodate a messenger sector of mass scale MXâ¼106GeV. This is due to the combined effects of renormalizable loop-suppressed operators and generic non-renormalizable ones governing the dilution of a pre-existing equilibrium gravitino abundance via messenger decay. The above range of gravitino and messenger masses can be accommodated in indirect GMSB scenarios. The gravitino abundance does not depend on the post-inflationary reheat temperature and it is shown that leptogenesis can generate successfully the baryon asymmetry.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Nuclear and High Energy Physics
Authors
Martin Lemoine, Gilbert Moultaka, Karsten Jedamzik,