Extending two Higgs doublet models for two-loop neutrino mass generation and one-loop neutrinoless double beta decay

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• 作者：Zhen Liu ^{liu-zhen@sjtu.edu.cn} ; Pei-Hong Gu ; ^{peihong.gu@sjtu.edu.cn}
• 刊名：Nuclear Physics B
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：915
• 期：Complete
• 页码：206-223
• 全文大小：467 K
• 卷排序：915

文摘

We extend some two Higgs doublet models, where the Yukawa couplings for the charged fermion mass generation only involve one Higgs doublet, by two singlet scalars respectively carrying a singly electric charge and a doubly electric charge. The doublet and singlet scalars together can mediate a two-loop diagram to generate a tiny Majorana mass matrix of the standard model neutrinos. Remarkably, the structure of the neutrino mass matrix is fully determined by the symmetric Yukawa couplings of the doubly charged scalar to the right-handed leptons. Meanwhile, a one-loop induced neutrinoless double beta decay can arrive at a testable level even if the electron neutrino has an extremely small Majorana mass. We also study other experimental constraints and implications including some rare processes and Higgs phenomenology.