Can MSSM Particle be the Inflaton?

Details Can MSSM Particle be the Inflaton? Can MSSM Particle be the Inflaton?

2003-12-06

arxiv.org/abs/hep-ph/0312094v3

Phys.Lett. B593 (2004) 33-41

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, 1 figure; an explanatory comment and references are added

Scientific paper

10.1016/j.physletb.2004.04.071

We consider the possibility of using one of the $D$-flat directions in the minimal supersymmetric standard model (MSSM) as the inflaton. We show that the flat direction consisting of (first generation) left- and right-handed up-squarks as well as the up-type Higgs boson may play the role of the inflaton if dominant part of the up-quark mass is radiatively generated from supersymmetric loop diagrams. We also point out that, if the R-parity violating Yukawa coupling is of $O(10^{-7})$, $R$-odd $D$-flat directions may be another possible candidate of the inflaton. Such inflation models using $D$-flat directions in the MSSM are not only testable with collider experiments but also advantageous to resolve the problem how the inflaton reheats the universe.

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