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Revisiting discrete dark matter model: theta(13) ≠ 0 and v(R) dark matter

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Title: Revisiting discrete dark matter model: theta(13) ≠ 0 and v(R) dark matter
Authors: Hamada, Yuta Browse this author
Kobayashi, Tatsuo Browse this author →KAKEN DB
Ogasahara, Atsushi Browse this author
Omura, Yuji Browse this author
Takayama, Fumihiro Browse this author
Yasuhara, Daiki Browse this author
Keywords: Beyond Standard Model
Neutrino Physics
Discrete and Finite Symmetries
Issue Date: 30-Oct-2014
Publisher: Springer
Journal Title: Journal of high energy physics
Volume: 2014
Issue: 10
Start Page: 183
Publisher DOI: 10.1007/JHEP10(2014)183
Abstract: We revisit the discrete dark matter model with the A(4) flavor symmetry originally introduced by M.Hirsch et. al. We show that radiative corrections can lead to non-zero theta(13) and the non-zero mass for the lightest neutrino. We find an interesting relation among neutrino mixing parameters and it indicates the sizable deviation of s(23) from the maximal angle s(23)(2) = 1/2 and the degenerate mass spectrum for neutrinos. Also we study the possibilities that the right-handed neutrino is a dark matter candidate. Assuming that the thermal freeze-out explains observed dark matter abundance, TeV-scale right-handed neutrino and flavored scalar bosons are required. In such a case, the flavor symmetry plays an important role for the suppression of lepton flavor violating processes as well as for the stability of dark matter. We show that this scenario is viable within currently existing constraints from collider, low energy experiments and cosmological observations.
Type: article
Appears in Collections:理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 小林 達夫

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