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language
eng
Author
Haba, Naoyuki Hokkaido University
Seto, Osamu
Yamaguchi, Yuya
Description
Under the assumption of hierarchical right-handed neutrino masses, masses of right-handed neutrinos must be larger than 10^8 GeV in the standard thermal leptogenesis scenario, while the mass can be reduced to around 5 TeV in a neutrinophilic two Higgs doublet model. On the other hand, resonant leptogenesis can work with the masses of TeV scale. However, necessary degeneracy between the lightest and the secondlightest right-handed neutrino masses means unnatural fine-tuning of the order of 10^9. In this paper, we will investigate the resonant leptogenesis scenario in a neutrinophilic two Higgs doublet model. We will find the mass can be reduced to 2 TeV, and the degeneracy becomes much milder as of the order of 10^4.
Journal Title
Physical review. D
Volume
87
Issue
12
Start Page
123540_1
End Page
123540_7
ISSN
10894918
Published Date
2013-06
DOI
NCID
AA11734624
Publisher
American Physical Society
NII Type
Journal Article
Format
PDF
Rights
©2013 American Physical Society
Text Version
出版社版
Gyoseki ID
e19639
OAI-PMH Set
Other
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