TY - JOUR
T1 - Gravitino problem in supergravity chaotic inflation and SUSY breaking scale after BICEP2
AU - Nakayama, Kazunori
AU - Takahashi, Fuminobu
AU - Yanagida, Tsutomu T.
N1 - Funding Information:
This work was supported by the Grant-in-Aid for Scientific Research on Innovative Areas (No. 23104008 [FT]), JSPS Grant-in-Aid for Young Scientists (B) (No. 24740135 ) [FT], and Inoue Foundation for Science [FT]. This work was also supported by World Premier International Research Center Initiative (WPI Program), MEXT , Japan.
PY - 2014/6/27
Y1 - 2014/6/27
N2 - Gravitinos are generically produced by inflaton decays, which place tight constraints on inflation models as well as supersymmetry breaking scale. We revisit the gravitino production from decays of the inflaton and the supersymmetry breaking field, based on a chaotic inflation model suggested by the recent BICEP2 result. We study cosmological constraints on thermally and non-thermally produced gravitinos for a wide range of the gravitino mass, and show that there are only three allowed regions of the gravitino mass: m3/2 ≲ 16eV, m3/2 ≃ 10-1000TeV and m3/2 ≳ 1013GeV.
AB - Gravitinos are generically produced by inflaton decays, which place tight constraints on inflation models as well as supersymmetry breaking scale. We revisit the gravitino production from decays of the inflaton and the supersymmetry breaking field, based on a chaotic inflation model suggested by the recent BICEP2 result. We study cosmological constraints on thermally and non-thermally produced gravitinos for a wide range of the gravitino mass, and show that there are only three allowed regions of the gravitino mass: m3/2 ≲ 16eV, m3/2 ≃ 10-1000TeV and m3/2 ≳ 1013GeV.
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U2 - 10.1016/j.physletb.2014.05.078
DO - 10.1016/j.physletb.2014.05.078
M3 - Article
AN - SCOPUS:84902012456
SN - 0370-2693
VL - 734
SP - 358
EP - 363
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
ER -