LHCb anomaly and B physics in flavored Z′ models with flavored Higgs doublets

LHCb anomaly and B physics in flavored Z′ models with flavored Higgs doublets We study an extended Standard Model with a gauged U(1)′ flavor symmetry, motivated not only by the fermion mass hierarchy but also by the excesses in B→K(*)ll reported by the LHCb collaborations. The U(1)′ charges are assigned to quarks and leptons in a flavor-dependent manner, and flavored Higgs doublets are also introduced in order to detail the Yukawa couplings at the renormalizable level. Then, the fermion mass hierarchy is realized by the vacuum alignment of the Higgs doublets. In this model, flavor-changing currents involving the gauge boson of U(1)′ and the scalars generated by the Higgs doublets are predicted and the observables in the B→K(*)ll process possibly deviate from the Standard Model predictions. We study the possibility that these new flavor-changing interactions can explain the excesses in the B→K(*)ll process, and we derive some predictions for the other flavor-violating processes based on the analysis. We specifically investigate the ΔF=2 processes and the other B decays: e.g., B→Xsγ and B→D(*)τν, where the deviations are reported by the Belle and BABAR collaborations. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physical Review D American Physical Society (APS)

LHCb anomaly and B physics in flavored Z′ models with flavored Higgs doublets

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LHCb anomaly and B physics in flavored Z′ models with flavored Higgs doublets

Abstract

We study an extended Standard Model with a gauged U(1)′ flavor symmetry, motivated not only by the fermion mass hierarchy but also by the excesses in B→K(*)ll reported by the LHCb collaborations. The U(1)′ charges are assigned to quarks and leptons in a flavor-dependent manner, and flavored Higgs doublets are also introduced in order to detail the Yukawa couplings at the renormalizable level. Then, the fermion mass hierarchy is realized by the vacuum alignment of the Higgs doublets. In this model, flavor-changing currents involving the gauge boson of U(1)′ and the scalars generated by the Higgs doublets are predicted and the observables in the B→K(*)ll process possibly deviate from the Standard Model predictions. We study the possibility that these new flavor-changing interactions can explain the excesses in the B→K(*)ll process, and we derive some predictions for the other flavor-violating processes based on the analysis. We specifically investigate the ΔF=2 processes and the other B decays: e.g., B→Xsγ and B→D(*)τν, where the deviations are reported by the Belle and BABAR collaborations.
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Publisher
The American Physical Society
Copyright
Copyright © © 2017 American Physical Society
ISSN
1550-7998
eISSN
1550-2368
D.O.I.
10.1103/PhysRevD.95.115040
Publisher site
See Article on Publisher Site

Abstract

We study an extended Standard Model with a gauged U(1)′ flavor symmetry, motivated not only by the fermion mass hierarchy but also by the excesses in B→K(*)ll reported by the LHCb collaborations. The U(1)′ charges are assigned to quarks and leptons in a flavor-dependent manner, and flavored Higgs doublets are also introduced in order to detail the Yukawa couplings at the renormalizable level. Then, the fermion mass hierarchy is realized by the vacuum alignment of the Higgs doublets. In this model, flavor-changing currents involving the gauge boson of U(1)′ and the scalars generated by the Higgs doublets are predicted and the observables in the B→K(*)ll process possibly deviate from the Standard Model predictions. We study the possibility that these new flavor-changing interactions can explain the excesses in the B→K(*)ll process, and we derive some predictions for the other flavor-violating processes based on the analysis. We specifically investigate the ΔF=2 processes and the other B decays: e.g., B→Xsγ and B→D(*)τν, where the deviations are reported by the Belle and BABAR collaborations.

Journal

Physical Review DAmerican Physical Society (APS)

Published: Jun 1, 2017

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