Leptogenesis below the Davidson-Ibarra bound

Ma, Ernest ; Sahu, Narendra ; Sarkar, Utpal (2006) Leptogenesis below the Davidson-Ibarra bound Journal of Physics G: Nuclear and Particle Physics, 32 (11). L65-L68. ISSN 0954-3899

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Official URL: http://iopscience.iop.org/0954-3899/32/11/L01

Related URL: http://dx.doi.org/10.1088/0954-3899/32/11/L01

Abstract

The observed baryon asymmetry of the Universe is suitably created in thermal leptogenesis through the out-of-equilibrium decay of N1, the lightest of the three heavy singlet neutral fermions which anchor the seesaw mechanism to obtain small Majorana neutrino masses. However, this scenario suffers from the incompatibility of a generic lower bound on the mass of N1 and the upper bound on the reheating temperature of the Universe after inflation. A modest resolution of this conundrum is proposed.

Item Type:Article
Source:Copyright of this article belongs to Institute of Physics.
ID Code:45415
Deposited On:28 Jun 2011 05:18
Last Modified:18 May 2016 01:41

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