Minimal supersymmetric hybrid inflation, flipped SU(5) and proton decay
Abstract
Minimal supersymmetric hybrid inflation utilizes a canonical Kähler potential and a renormalizable superpotential which is uniquely determined by imposing a U(1) R-symmetry. In computing the scalar spectral index n we take into account modifications of the tree level potential caused by radiative and supergravity corrections, as well as contributions from the soft supersymmetry breaking terms with a negative soft mass-squared term allowed for the inflaton. All of these contributions play a role in realizing n values in the range 0.96-0.97 preferred by WMAP. The U(1) R-symmetry plays an important role in flipped SU(5) by eliminating the troublesome dimension five proton decay. The proton decays into e+π0 via dimension six operators arising from the exchange of superheavy gauge bosons with a lifetime of order 1034-1036 years.
- Publication:
-
Physics Letters B
- Pub Date:
- April 2010
- DOI:
- 10.1016/j.physletb.2010.03.072
- arXiv:
- arXiv:0912.4737
- Bibcode:
- 2010PhLB..688...75R
- Keywords:
-
- High Energy Physics - Phenomenology;
- Astrophysics - Cosmology and Nongalactic Astrophysics
- E-Print:
- 14 pages, 8 figures