Sneutrino hybrid inflation in supergravity
Sneutrino hybrid inflation in supergravity
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.
083519-[5pp]
Antusch, Stefan
6a8c0380-78ea-4bcb-afad-4348d84eafba
Bastero-Gil, Mar
16b57761-3a65-4b65-844f-2a63dd69af0d
King, Steve F.
f8c616b7-0336-4046-a943-700af83a1538
Shafi, Qaisar
547764f3-e269-4c8b-b1e8-8b352b9814d1
2005
Antusch, Stefan
6a8c0380-78ea-4bcb-afad-4348d84eafba
Bastero-Gil, Mar
16b57761-3a65-4b65-844f-2a63dd69af0d
King, Steve F.
f8c616b7-0336-4046-a943-700af83a1538
Shafi, Qaisar
547764f3-e269-4c8b-b1e8-8b352b9814d1
Antusch, Stefan, Bastero-Gil, Mar, King, Steve F. and Shafi, Qaisar
(2005)
Sneutrino hybrid inflation in supergravity.
Physical Review D, 71 (8), .
(doi:10.1103/PhysRevD.71.083519).
Abstract
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.
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Published date: 2005
Identifiers
Local EPrints ID: 56972
URI: http://eprints.soton.ac.uk/id/eprint/56972
ISSN: 1550-7998
PURE UUID: 9ad691cd-86f6-4961-b94b-8aaccee0b862
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Date deposited: 13 Aug 2008
Last modified: 15 Mar 2024 11:04
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Author:
Stefan Antusch
Author:
Mar Bastero-Gil
Author:
Qaisar Shafi
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