ダウンロード数 : ?
ID 28749
ファイル
言語
英語
著者
波場 直之 Hokkaido University
Seto, Osamu
Yamaguchi, Yuya
内容記述(抄録等)
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.
掲載誌名
Physical review. D
87
12
開始ページ
123540_1
終了ページ
123540_7
ISSN
10894918
発行日
2013-06
DOI
NCID
AA11734624
出版者
American Physical Society
資料タイプ
学術雑誌論文
ファイル形式
PDF
権利関係
©2013 American Physical Society
著者版/出版社版
出版社版
業績ID
e19639
部局
他機関