Alternative Minimal U(1) B − L

開始日時 2021/02/16 11:00
終了日時 2021/02/16 12:00
講演者 Mr. Shih-Yen Tseng ( 東京大学 )
会場 Online (Zoom)
連絡先 松戸 竜太郎 /
言語 English


We propose a minimal alternative gauged U(1)B−LB−L model in which three right-handed neutrinos with charges of (5,-4,-4) and only one B-L Higgs field with charge 1 are introduced. Consistent active neutrino masses and mixings can be obtained if a Z2Z2 symmetry on two of the right-handed neutrinos is introduced. It predicts two heavy degenerate right-handed neutrinos, which may realize the resonant leptogenesis scenario, and one relatively light sterile neutrino, which is a good dark matter candidate.