Sneutrino hybrid inflation in supergravity
Sneutrino hybrid inflation in supergravity
复制标题
超重力中的中微子混合膨胀
DOI:
10.1103/physrevd.71.083519
复制
发表时间:
2004
影响因子:
5
通讯作者:
Q. Shafi
中科院分区:
文献类型:
--
作者:
S. Antusch;M. Bastero;S. King;Q. Shafi
We propose a hybrid inflation scenario in which the singlet sneutrino, the superpartner of the right-handed neutrino, plays the role of the inflaton. We study a minimal model of sneutrino hybrid inflation in supergravity, where we find a spectral index ns[approximate]1+2gamma with |gamma|<~0.02, and predict a running spectral index |dns/dlnk|<<|gamma| and a tensor-to-scalar ratio r<<gamma2 for field values well below the Planck scale. In our scenario, the baryon asymmetry of our universe can be explained via nonthermal leptogenesis and a low reheat temperature TRH[approximate]106 GeV can be realized.