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Affleck-Dine leptogenesis via right-handed sneutrino fields in a supersymmetric hybrid inflation model

Berezhiani, Zurab and Mazumdar, Anupam and Pérez-Lorenzana, Abdel (2001) Affleck-Dine leptogenesis via right-handed sneutrino fields in a supersymmetric hybrid inflation model. Physics Letters B, 518 (3-4). pp. 282-293. ISSN 0370-2693

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Abstract

The onset of inflation in hybrid models require fine tuning in the initial conditions. The inflaton field should have an initial value close to the Planck scale $M_{P}$, whereas the auxiliary "orthogonal" field must be close to zero with an extreme accuracy. This problem can be alleviated if the orthogonal field fastly decays into some states not coupled to the inflaton. Natural candidates for such states can be the right-handed neutrinos. We show that a non-trivial evolution of the classic sneutrino fields after inflation offers an interesting mechanism for generating a correct amount of lepton asymmetry, which being reprocessed by sphalerons can explain the observed baryon asymmetry of the Universe. Our scenario implies interesting bounds for the neutrino masses in the context of seesaw mechanism.

Item Type: Article
Journal or Publication Title: Physics Letters B
Additional Information: 9 pages, no figures
Subjects:
Departments: Faculty of Science and Technology > Physics
ID Code: 63510
Deposited By: ep_importer_pure
Deposited On: 03 May 2013 10:58
Refereed?: Yes
Published?: Published
Last Modified: 22 Nov 2017 22:51
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/63510

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