Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2006-03-06
J.Phys. G32 (2006) L65-L68
Physics
High Energy Physics
High Energy Physics - Phenomenology
7 pages, 1 figure
Scientific paper
The observed baryon asymmetry of the Universe is suitably created in thermal leptogenesis through the out-of-equilibrium decay of $N_1$, 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 $N_1$ and the upper bound on the reheating temperature of the Universe after inflation. A modest resolution of this conundrum is proposed.
Ma Ernest
Sahu Narendra
Sarkar Utpal
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