Abstract
In the present work we study non-thermal leptogenesis and baryon asymmetry in the universe in different neutrino mass models discussed recently. For each model we obtain a formula relating the reheating temperature after inflation to the inflaton mass. It is shown that all but four cases are excluded and that in the cases which survive the inflaton mass and the reheating temperature after inflation are bounded from below and from above.
Highlights
The Standard Model (SM) of particle physics [1] is a very successful theoretical framework for all low-energy phenomena
The aim of the present work is to study the same models in the framework of non-thermal leptogenesis and derive the constaints on the inflaton mass and the reheating temperature after inflation
We shall begin with the SM case first and we shall use for the fraction C the SM value, namely C = −28/79
Summary
The Standard Model (SM) of particle physics [1] is a very successful theoretical framework for all low-energy phenomena. It is widely considered to be a low-energy limit of some underline fundamental theory. Perhaps the most direct evidence for physics beyond the SM is the recent discovery that neutrinos have small but finite masses [2, 3, 4]. A simple and natural way to explain the tiny neutrino masses is via the seesaw mechanism [5]. [6]) seem to indicate neutrino masses in the sub-eV range (0.001 eV < mν < 0.1 eV ), which implies that heavy right-handed neutrinos weigh ∼ 1010 GeV − 1015 GeV [7] Atmospheric, reactor and accelerator neutrino experiments (for a summary of three-flavour neutrino oscillation parameters see e.g. [6]) seem to indicate neutrino masses in the sub-eV range (0.001 eV < mν < 0.1 eV ), which implies that heavy right-handed neutrinos weigh ∼ 1010 GeV − 1015 GeV [7]
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