A new leptogenesis scenario parametrized by Dirac neutrino mass matrix

Abstract

In an $SU(3{)}_c\times SU(2{)}_L\times SU(2{)}_R\times U(1{)}_{B-L}$ left-right symmetric framework, we present a new leptogenesis scenario parametrized by Dirac neutrino mass matrix. Benefited from the parity symmetry motivated to solve the strong CP problem, the dimensionless couplings of the mirror fields are identified to those of the ordinary fields. In particular, the mirror Dirac neutrinos have a heavy mass matrix proportional to the light mass matrix of the ordinary Dirac neutrinos. Through the $SU(2{)}_R$ gauge interactions, the mirror neutrinos can decay to generate a lepton asymmetry in the mirror muons and an opposite lepton asymmetry in the mirror electrons. Before the $SU(2{)}_L$ sphaleron processes stop working, the mirror muons can efficiently decay into the ordinary right-handed leptons with a dark matter scalar and hence the mirror muon asymmetry can be partially converted to a desired baryon asymmetry.

8 pages, 3 figures. Basic idea and results are unchanged while model and demonstrations are improved

References in corpus (8)

• Leptogenesis
• Gauge Singlet Scalars as Cold Dark Matter
• Complex Singlet Extension of the Standard Model
• The real singlet scalar dark matter model
• Quark Seesaw, Vectorlike Fermions and Diphoton Excess
• Neutrino Mass and Baryon Asymmetry from Dirac Seesaw
• Implications of the diphoton excess on Left-Right models and gauge unification
• Collider signatures of mirror fermions in the framework of Left Right Mirror Model

Cited by in corpus (2)

• Spontaneous mirror left-right symmetry breaking for leptogenesis parametrized by Majorana neutrino mass matrix
• Parametrized leptogenesis from linear seesaw