Resonant Leptogenesis in the Minimal B-L Extended Standard Model at TeV
Abstract
We investigate the resonant leptogenesis scenario in the minimal B-L extended standard model(SM) with the B-L symmetry breaking at the TeV scale. Through detailed analysis of the Boltzmann equations, we show how much the resultant baryon asymmetry via leptogenesis is enhanced or suppressed, depending on the model parameters, in particular, the neutrino Dirac Yukawa couplings and the TeV-scale Majorana masses of heavy degenerate neutrinos. In order to consider a realistic case, we impose a simple ansatz for the model parameters and analyze the neutrino oscillation parameters and the baryon asymmetry via leptogenesis as a function of only a single CP-phase. We find that for a fixed CP-phase all neutrino oscillation data and the observed baryon asymmetry of the present universe can be simultaneously reproduced.
Keywords
Cite
@article{arxiv.1011.4769,
title = {Resonant Leptogenesis in the Minimal B-L Extended Standard Model at TeV},
author = {Satoshi Iso and Nobuchika Okada and Yuta Orikasa},
journal= {arXiv preprint arXiv:1011.4769},
year = {2013}
}
Comments
25 pages, 15 figures, version to be published in Phys. Rev. D