Cosmophysics Seminar ( Dr. Shintaro Eijima )

#Cosmophysics Seminar

Category	Cosmophysics Seminar
Start	2019/12/12 (Thu) 3:30 PM
End	2019/12/12 (Thu) 4:30 PM
Venue	Kenkyu-Honkan 1F, Meeting Room 1
Title	Sterile neutrino dark matter and heavy neutral leptons
Speaker	Dr. Shintaro Eijima ( KEK )
Language	英語/English
Contact	Toyokazu Sekiguchi／tsekiguc -AT- post.kek.jp
Website
Cafeteria	利用予定なし／0

Abstract

Sterile neutrino as a possible dark matter candidate is reviewed. I will give an overview of the current status of the research on the dark matter particle, and discuss the motivation and limits obtained through astrophysical observations. Originally the thermal production via mixing was suggested which, however, is ruled out in current constraints. I will introduce different mechanisms to produce the dark matter. In particular a resonant production with lepton asymmetry in thermal plasma and the asymmetry originated by heavy neutral leptons are explained.

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