R(D(∗)) from W ′ and right-handed neutrinos

• DOI: 10.1007/jhep09(2018)169
• Publication Date: 2018-09-29T06:54:54Z
• Authors: Admir Greljo; Dean J. Robinson; Bibhushan Shakya; Jure Zupan
• Keywords: Hypercharge; Dark radiation; Gauge group; Missing energy

A bstract We provide an ultraviolet (UV) complete model for the R ( D (∗) ) anomalies, in which additional contribution to semi-tauonic b → c transitions arises from decay a right-handed sterile neutrino via exchange of TeV-scale SU(2) L singlet W ′ . The is based on extension Standard Model (SM) hypercharge group, U(1) Y , V × gauge containing several pairs heavy vector-like fermions. present comprehensive phenomenological survey model, ranging low-energy flavor physics, direct searches at LHC, physics and cosmology. show that, while Z -induced constraints are important, it possible find parameter space naturally consistent with all available data. sector also offers rich phenomenology, including possibilities measurable dark radiation, gamma ray signals, displaced decays colliders.