Loop suppression of Dirac neutrino mass in the neutrinophilic two-Higgs-doublet model

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• 作者：Shinya Kanemura ; Toshinori Matsui ; Hiroaki Sugiyama
• 刊名：Physics Letters B
• 出版年：25 November, 2013
• 年：2013
• 卷：727
• 期：1-3
• 页码：151-156
• 全文大小：263 K

文摘

We extend the scalar sector of the neutrinophilic two-Higgs-doublet model, where small masses of Dirac neutrinos are obtained via a small vacuum expectation value of the neutrinophilic -doublet scalar field which has a Yukawa interaction with only right-handed neutrinos. A global symmetry is used for the neutrinophilic nature of the second -doublet scalar field and also for eliminating Majorana mass terms of neutrinos. By virtue of an appropriate assignment of the -charges to new particles, our model has an unbroken symmetry, under which the lightest -odd scalar boson can be a dark matter candidate. In our model, is generated by the one-loop diagram to which -odd particles contribute. We briefly discuss a possible signature of our model at the LHC.