Some constraints on the Yukawa parameters in the neutrino modification of the Standard Model (nuMSM) and CP-violation

Abstract

The equations connecting elements of the Yukawa matrix to elements of the active neutrino mass matrix in the νMSM theory (an extension of the Standard Model by a singlet of three right-handed neutrinos) was analyzed, and explicit relations for the ratio of the Yukawa matrix elements through elements of the active neutrino mass matrix were obtained. This relation can be used for getting more accurate constraints on the model parameters. Particularly, with the help of the obtained results we investigated CP-violating phase in the νMSM theory. We demonstrate that even in the case when elements of the active neutrino mass matrix are real the baryon asymmetry can be generated also.

14 pages, 2 figures, many clarifications and references added

References in corpus (6)

• The role of sterile neutrinos in cosmology and astrophysics
• On initial conditions for the Hot Big Bang
• Sterile neutrinos, dark matter, and the pulsar velocities in models with a Higgs singlet
• A possible symmetry of the $\nu$MSM
• Light inflaton Hunter's Guide
• Inflaton mass in the nuMSM inflation

Cited by in corpus (6)

• The Phenomenology of Right Handed Neutrinos
• Dark Matter, Baryogenesis and Neutrino Oscillations from Right Handed Neutrinos
• Sterile Neutrinos as the Origin of Dark and Baryonic Matter
• Experimental bounds on sterile neutrino mixing angles
• Production of GeV-scale heavy neutral leptons in 3-body decays. Comparison with the PYTHIA approach
• Constraints on the parameters of the neutrino extension of the Standard Model