#### \( {R}_{D^{\left(*\right)}},{R}_{K^{\left(*\right)}} \) and neutrino mass in the 2HDM-III with right-handed neutrinos

Journal of High Energy Physics
September 2018, 2018:149 | Cite as
\( {R}_{D^{\left(*\right)}},{R}_{K^{\left(*\right)}} \) and neutrino mass in the 2HDM-III with right-handed neutrinos
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Shao-Ping LiXin-Qiang LiYa-Dong YangXin Zhang
Open Access
Regular Article - Theoretical Physics
First Online: 26 September 2018
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Abstract
Given that the two-Higgs-doublet model of type III (2HDM-III) has the potential to address the \( {R}_{D^{\left(*\right)}} \) anomalies while the resolution to the \( {R}_{K^{\left(*\right)}} \) deficits requires new degrees of freedom within this framework, we consider in this paper a unified scenario where the low-scale type-I seesaw mechanism is embedded into the 2HDM-III, so as to accommodate the \( {R}_{D^{\left(*\right)}} \) and \( {R}_{K^{\left(*\right)}} \) anomalies as well as the neutrino mass. We first revisit the \( {R}_{D^{\left(*\right)}} \) anomalies and find that the current world-averaged results can be addressed at 2σ level without violating the bound from the branching ratio \( \mathrm{\mathcal{B}}\left({B}_c^{-}\to {\tau}^{-}\overline{\nu}\right) \) ≤ 30%. The scenario predicts two sub-eV neutrino masses based on a decoupled heavy Majorana neutrino and two nearly degenerate Majorana neutrinos with mass around the electroweak scale. For the \( {R}_{K^{\left(*\right)}} \) anomalies, the same scenario can generate the required Wilson coefficients in the direction C 9 μ NP = − C 10 μ NP < 0, with \( \mathcal{O}(1) \) Yukawa couplings for the muon and the top quark.
Keywords Beyond Standard Model Heavy Quark Physics
ArXiv ePrint: 1807.08530
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Copyright information
© The Author(s) 2018
Authors and Affiliations
Shao-Ping Li1Xin-Qiang Li1Email authorView author's OrcID profileYa-Dong Yang1Xin Zhang11.Institute of Particle Physics and Key Laboratory of Quark and Lepton Physics (MOE)Central China Normal UniversityWuhanChina