TY - JOUR
T1 - Gravitino problem in minimal supergravity inflation
AU - Hasegawa, Fuminori
AU - Mukaida, Kyohei
AU - Nakayama, Kazunori
AU - Terada, Takahiro
AU - Yamada, Yusuke
N1 - Funding Information:
The authors are grateful to Renata Kallosh and Andrei Linde for useful comments on their manuscript. FH thank Yutaro Shoji for useful discussion. KM, KN, and TT thank Yohei Ema for discussion. TT is grateful to Kenji Kadota, Tomoki Nosaka, and Yasuhiro Yamamoto for discussions. YY would like to thank Renata Kallosh for useful discussion about orthogonal superfields and Lorentz violation. This work is supported in part by National Research Foundation of Korea (NRF) Research Grant NRF-2015R1A2A1A05001869 [TT], JSPS Grant-in-Aid for Scientific Research on Scientific Research A (JP26247042), Young Scientists B (JP26800121) and Innovative Areas (JP26104009 and JP15H05888) [KN], Grant-in-Aid for JSPS Research Fellow JP15J07034, JSPS Research Fellowships for Young Scientists, World Premier International Research Center Initiative (WPI Initiative), MEXT, Japan [KM], SITP and the NSF grant PHY-1316699 [YY].
Publisher Copyright:
© 2017 The Author(s)
PY - 2017/4/10
Y1 - 2017/4/10
N2 - We study non-thermal gravitino production in the minimal supergravity inflation. In this minimal model utilizing orthogonal nilpotent superfields, the particle spectrum includes only graviton, gravitino, inflaton, and goldstino. We find that a substantial fraction of the cosmic energy density can be transferred to the longitudinal gravitino due to non-trivial change of its sound speed. This implies either a breakdown of the effective theory after inflation or a serious gravitino problem.
AB - We study non-thermal gravitino production in the minimal supergravity inflation. In this minimal model utilizing orthogonal nilpotent superfields, the particle spectrum includes only graviton, gravitino, inflaton, and goldstino. We find that a substantial fraction of the cosmic energy density can be transferred to the longitudinal gravitino due to non-trivial change of its sound speed. This implies either a breakdown of the effective theory after inflation or a serious gravitino problem.
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U2 - 10.1016/j.physletb.2017.02.030
DO - 10.1016/j.physletb.2017.02.030
M3 - Article
AN - SCOPUS:85013347489
SN - 0370-2693
VL - 767
SP - 392
EP - 397
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 -