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Title: Implications of hidden gauged U ( 1 ) model for B anomalies

Journal Article · · Physical Review D

We propose a hidden gauged $$U(1{)}_{H}$$ $${Z}^{{'}}$$ model to explain deviations from the standard model (SM) values in lepton flavor universality known as $${R}_{K}$$ and $${R}_{D}$$ anomalies. The $${Z}^{{'}}$$ only interacts with the SM fermions via their mixing with vectorlike doublet fermions after the $$U(1{)}_{H}$$ symmetry breaking, which leads to $$b{\rightarrow}s{\mu}{\mu}$$ transition through the $${Z}^{{'}}$$ at tree level. Moreover, introducing an additional mediator, inert-Higgs doublet, yields $$b{\rightarrow}c{\tau}{\nu}$$ process via charged scalar contribution at tree level. Using flavio package, we scrutinize adequate sizes of the relevant Wilson coefficients to these two processes by taking various flavor observables into account. It is found that significant mixing between the vectorlike and the second generation leptons is needed for the $${R}_{K}$$ anomaly. A possible explanation of the $${R}_{D}$$ anomaly can also be simultaneously addressed in a motivated situation, where a single scalar operator plays a dominant role, by the successful model parameters for the $${R}_{K}$$ anomaly.

Research Organization:
Univ. of Massachusetts, Amherst, MA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP)
Grant/Contract Number:
SC0011095
OSTI ID:
1440392
Alternate ID(s):
OSTI ID: 1498663
Journal Information:
Physical Review D, Journal Name: Physical Review D Vol. 97 Journal Issue: 11; ISSN 2470-0010
Publisher:
American Physical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 33 works
Citation information provided by
Web of Science

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