${Z}^{\ensuremath{'}}$ models for the LHCb and $g\ensuremath{-}2$ muon anomalies

$Z^{'}$ models for the LHCb and $g - 2$ muon anomalies

Ben Allanach, Farinaldo S. Queiroz, Alessandro Strumia, and Sichun Sun

Phys. Rev. D 93, 055045 – Published 29 March 2016; Erratum Phys. Rev. D 95, 119902 (2017)

Abstract

We revisit a class of $Z^{'}$ explanations of the anomalies found by the LHCb collaboration in $B$ decays, and show that the scenario is tightly constrained by a combination of constraints: (i) LHC searches for dimuon resonances, (ii) perturbativity of the $Z^{'}$ couplings; (iii) the $B_{s}$ mass difference, and (iv) electroweak precision data. Solutions are found by suppressing the $Z^{'}$ coupling to electrons and to light quarks and/or by allowing for a $Z^{'}$ decay width into dark matter. We also present a simplified framework where a TeV-scale $Z^{'}$ gauge boson that couples to standard leptons as well as to new heavy vectorlike leptons, can simultaneously accommodate the LHCb anomalies and the muon $g - 2$ anomaly.

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Received 1 February 2016

DOI:https://doi.org/10.1103/PhysRevD.93.055045

Physics Subject Headings (PhySH)

Extensions of gauge sector Flavor changing neutral currents Hypothetical particle physics models Leptonic, semileptonic & radiative decays Magnetic moment

Particles & Fields

Erratum

Erratum: $Z^{'}$ models for the LHCb and $g - 2$ muon anomalies [Phys. Rev. D 93, 055045 (2016)]

Ben Allanach, Farinaldo S. Queiroz, Alessandro Strumia, and Sichun Sun

Phys. Rev. D 95, 119902 (2017)

Authors & Affiliations

Ben Allanach^*

DAMTP, CMS, Wilberforce Road, University of Cambridge, Cambridge CB3 0WA, United Kingdom

Farinaldo S. Queiroz^†

Max-Planck-Institut fur Kernphysik, Postfach 103980, 69029 Heidelberg, Germany

Alessandro Strumia^‡

Dipartimento di Fisica dell’ Universita di Pisa and INFN, Pisa 56127, Italy and National Institute of Chemical Physics and Biophysics, Tallinn 12618, Estonia

Sichun Sun^§

Institute for Advanced Study, Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong

^*B.C.Allanach@damtp.cam.ac.uk
^†queiroz@mpi-hd.mgd.de
^‡alessandro.strumia@cern.ch
^§sichun@uw.edu

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Vol. 93, Iss. 5 — 1 March 2016

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Physical Review D

covering particles, fields, gravitation, and cosmology

$Z^{'}$ models for the LHCb and $g - 2$ muon anomalies

Ben Allanach, Farinaldo S. Queiroz, Alessandro Strumia, and Sichun Sun

Phys. Rev. D 93, 055045 – Published 29 March 2016; Erratum Phys. Rev. D 95, 119902 (2017)

Abstract

Physics Subject Headings (PhySH)

Erratum

Erratum: $Z^{'}$ models for the LHCb and $g - 2$ muon anomalies [Phys. Rev. D 93, 055045 (2016)]

Ben Allanach, Farinaldo S. Queiroz, Alessandro Strumia, and Sichun Sun

Phys. Rev. D 95, 119902 (2017)

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Physical Review D

covering particles, fields, gravitation, and cosmology

Z′ models for the LHCb and g−2 muon anomalies

Ben Allanach, Farinaldo S. Queiroz, Alessandro Strumia, and Sichun Sun

Phys. Rev. D 93, 055045 – Published 29 March 2016; Erratum Phys. Rev. D 95, 119902 (2017)

Abstract

Physics Subject Headings (PhySH)

Erratum

Erratum: Z′ models for the LHCb and g−2 muon anomalies [Phys. Rev. D 93, 055045 (2016)]

Ben Allanach, Farinaldo S. Queiroz, Alessandro Strumia, and Sichun Sun

Phys. Rev. D 95, 119902 (2017)

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$Z^{'}$ models for the LHCb and $g - 2$ muon anomalies

Erratum: $Z^{'}$ models for the LHCb and $g - 2$ muon anomalies [Phys. Rev. D 93, 055045 (2016)]