Nagoya University
Theoretical Elementary Particle Physics Laboratory

Date&Time Wed Dec 04 2019 (13:30 - 14:30)
Shintaro Eijima
Affiliation KEK
Title Probing leptogenesis in the nuMSM
Abstract Introducing right-handed neutrinos to the Standard Model is one of promising solutions for non-zero neutrino masses and the baryon asymmetry of the universe. The new particles with masses below the electroweak scale are called heavy neutral leptons (HNLs), which are a kind of long-lived particles. They are directly testable in intensity frontier experiments and colliders with displaced vertex method. In order to show a potential for probing leptogenesis in laboratories, we evaluate a parameter space for two HNLs to explain the observed baryon asymmetry and compare it with sensitivity of future experiments. This argument is a part of the nuMSM, and in the framework another HNL with the mass of keV scale is a candidate of dark matter. We discuss the late-time leptogenesis required by the resonant production of sterile neutrino dark matter as well.
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