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Solving the ?-problem in hybrid inflation with Heisenberg symmetry and stabilized modulus

Solving the ?-problem in hybrid inflation with Heisenberg symmetry and stabilized modulus
Solving the ?-problem in hybrid inflation with Heisenberg symmetry and stabilized modulus
We propose a class of models in which the ?-problem of supersymmetric hybrid inflation is resolved using a Heisenberg symmetry, where the associated modulus field is stabilized and made heavy with the help of the large vacuum energy during inflation without any fine-tuning. The proposed class of models is well motivated both from string theory considerations, since it includes the commonly encountered case of no-scale supergravity Kähler potential, and from the perspective of particle physics since a natural candidate for the inflaton in this class of models is the right-handed sneutrino which is massless during the inflationary epoch, and subsequently acquires a large mass at the end of inflation. We study a specific example motivated by sneutrino hybrid inflation with no-scale supergravity in some detail, and show that the spectral index may lie within the latest WMAP range, while the tensor-to-scalar ratio is very small.

cosmology of theories beyond the SM, inflation, physics of the early universe
1475-7508
40
Antusch, Stefan
6a8c0380-78ea-4bcb-afad-4348d84eafba
Bastero-Gil, Mar
16b57761-3a65-4b65-844f-2a63dd69af0d
Dutta, Koushik
91e0b545-4e58-405a-910e-fa74b7889fd2
King, Steve F.
f8c616b7-0336-4046-a943-700af83a1538
Kostka, Philipp M.
b9b61289-32b3-43f6-b789-bf1b6cdb5d32
Antusch, Stefan
6a8c0380-78ea-4bcb-afad-4348d84eafba
Bastero-Gil, Mar
16b57761-3a65-4b65-844f-2a63dd69af0d
Dutta, Koushik
91e0b545-4e58-405a-910e-fa74b7889fd2
King, Steve F.
f8c616b7-0336-4046-a943-700af83a1538
Kostka, Philipp M.
b9b61289-32b3-43f6-b789-bf1b6cdb5d32

Antusch, Stefan, Bastero-Gil, Mar, Dutta, Koushik, King, Steve F. and Kostka, Philipp M. (2009) Solving the ?-problem in hybrid inflation with Heisenberg symmetry and stabilized modulus. Journal of Cosmology and Astroparticle Physics, 2009 (1), 40. (doi:10.1088/1475-7516/2009/01/040).

Record type: Article

Abstract

We propose a class of models in which the ?-problem of supersymmetric hybrid inflation is resolved using a Heisenberg symmetry, where the associated modulus field is stabilized and made heavy with the help of the large vacuum energy during inflation without any fine-tuning. The proposed class of models is well motivated both from string theory considerations, since it includes the commonly encountered case of no-scale supergravity Kähler potential, and from the perspective of particle physics since a natural candidate for the inflaton in this class of models is the right-handed sneutrino which is massless during the inflationary epoch, and subsequently acquires a large mass at the end of inflation. We study a specific example motivated by sneutrino hybrid inflation with no-scale supergravity in some detail, and show that the spectral index may lie within the latest WMAP range, while the tensor-to-scalar ratio is very small.

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More information

Published date: January 2009
Keywords: cosmology of theories beyond the SM, inflation, physics of the early universe

Identifiers

Local EPrints ID: 144091
URI: https://eprints.soton.ac.uk/id/eprint/144091
ISSN: 1475-7508
PURE UUID: 89b6141b-4840-4fe0-a203-1c1a794ef76c

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Date deposited: 26 Apr 2011 13:33
Last modified: 18 Jul 2017 23:08

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