Lower Bound on the Garvitino Mass m3/2>O(100)m_{3/2}>O(100) TeV in RR-Symmetry Breaking New Inflation

Nov 8, 2013
10 pages
Published in:
  • Phys.Rev.D 89 (2014) 5, 055014
  • Published: Mar 17, 2014
e-Print:
Report number:
  • IPMU13-218,
  • ICRR-REPORT-665-2013-14

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Abstract: (APS)

In supersymmetric theories, the R symmetry plays a unique role in suppressing a constant term in the superpotential. In single chiral field models of spontaneous breaking of a discrete R symmetry, an R-breaking field can be a good candidate for an inflaton in new inflation models. In this paper, we revisit the compatibility of the single-field R-breaking new inflation model with the results of the Planck experiment. As a result, we find that the model predicts a lower limit on the gravitino mass, m3/2>O(100)TeV, assuming that the R-symmetry breaking is dominantly induced by the inflaton and the inflaton dynamics is not affected by the supersymmetry-breaking sector, which can be guaranteed by symmetry or compositeness of the supersymmetry-breaking sector. This lower limit is consistent with the observed Higgs mass of 126 GeV when the masses of the top squarks are of order the gravitino mass scale. We also show that the baryon asymmetry of the Universe as well as the observed dark matter density can be consistently explained along with the R-breaking new inflation model, assuming leptogenesis and that the wino is the lightest supersymmetric particle.

Note:
  • 22 pages, 7 figures
  • 12.60.Jv
  • 98.80.Cq
  • inflation: model
  • mass: gravitation
  • gravitino: mass
  • mass: scale
  • top: mass
  • dark matter: density
  • baryon: asymmetry
  • inflaton