Leptogenesis parametrized by lepton mass matrices

The European Physical Journal C

Pei-Hong Gu¹  Xiao-Gang He² 

[1] Department of Physics and Astronomy, Shanghai Jiao Tong University, 800 Dongchuan Road, 200240, Shanghai, China;Department of Physics and Astronomy, Shanghai Jiao Tong University, 800 Dongchuan Road, 200240, Shanghai, China;Department of Physics, National Taiwan University, 106, Taipei, China;National Center for Theoretical Sciences, 300, Hsinchu, China;

关键词: Neutrino Mass;    Charged Lepton;    Vacuum Expectation Value;    Baryon Asymmetry;    Neutrino Mass Matrix;   

DOI  :  10.1140/epjc/s10052-016-4367-3

来源: Springer

【 摘 要 】

The conventional seesaw-leptogenesis can simultaneously explain the suppression of neutrino masses and the generation of cosmic baryon asymmetry, but usually it cannot predict an unambiguous relation between these two sectors. In this work we shall demonstrate a novel left–right symmetric scenario, motivated to solve the strong CP problem by parity symmetry, where the present baryon asymmetry is well described by three charged lepton masses and a seesaw-suppressed hermitian Dirac neutrino mass matrix. To produce the observed baryon asymmetry, this scenario requires that the neutrinos must have a normal hierarchical mass spectrum and their mixing matrix must contain a sizable Dirac CP phase. Our model can be tested in neutrino oscillation and neutrinoless double beta decay experiments.

【 授权许可】

CC BY