Towards excluding a light $Z^{\prime }$ explanation of $b\to s{\ell }^{+}{\ell }^{-}$

Abstract

The discrepancies between $b\to s{\ell }^{+}{\ell }^{-}$ data and the corresponding Standard Model predictions constitute the most significant hints for new physics (at the TeV scale or below) currently available. In fact, many scenarios that can account for these anomalies have been proposed in the literature. However, only a single light new physics explanation, i.e. with a mass below the $B$ meson scale, is possible: a light $Z^{\prime }$ boson. In this article, we point out that improved limits on $B\to K^{(\ast )}\nu \nu$, including the experimental sensitivities required for a proper treatment of the necessarily sizable $Z^{\prime }$ width, together with the forthcoming Belle~II analyses of $e^{+}{e}^{-}\to {\mu }^{+}{\mu }^{-}+\mathrm{invisible}$, can rule out a $Z^{\prime }$ explanation of $b\to s{\ell }^{+}{\ell }^{-}$ data with a mass below $\approx 4$GeV. Importantly, such a light $Z^{\prime }$ is the only viable single particle solution to the $b\to s{\ell }^{+}{\ell }^{-}$ anomalies predicting $R(K^{(\ast )})>0$ in high $q^2$ bins, therefore providing an essential consistency test of data.

arXiv comment8 pages, 4 figures

References in corpus (143)

• Final Report of the Muon E821 Anomalous Magnetic Moment Measurement at BNL
• Measurement of the Positive Muon Anomalous Magnetic Moment to 0.46 ppm
• The anomalous magnetic moment of the muon in the Standard Model
• Leading hadronic contribution to the muon magnetic moment from lattice QCD
• Test of lepton universality with $B^0\to K^{\ast 0}{\ell }^{+}{\ell }^{-}$ decays
• The muon $g-2$ and $\alpha (M_Z^2)$: a new data-based analysis
• Complete Tenth-Order QED Contribution to the Muon g-2
• Refinements in electroweak contributions to the muon anomalous magnetic moment
• Reevaluation of the hadronic vacuum polarisation contributions to the Standard Model predictions of the muon g-2 and alpha(mZ) using newest hadronic cross-section data
• Hadronic light-by-light scattering contribution to the muon anomalous magnetic moment revisited
• The $g-2$ of charged leptons, $\alpha (M_Z^2)$ and the hyperfine splitting of muonium
• Hadronic contribution to the muon anomalous magnetic moment to next-to-next-to-leading order
• Two-pion contribution to hadronic vacuum polarization
• A new evaluation of the hadronic vacuum polarisation contributions to the muon anomalous magnetic moment and to $\mathbf{\alpha }({\mathbf{m}}_{\mathbf{Z}}^2)$
• The electroweak contributions to (g-2)_μ after the Higgs boson mass measurement
• $B\to V{\ell }^{+}{\ell }^{-}$ in the Standard Model from Light-Cone Sum Rules
• Observation of the rare $B_s^0\to {\mu }^{+}{\mu }^{-}$ decay from the combined analysis of CMS and LHCb data
• B-physics anomalies: a guide to combined explanations
• Remarks on higher-order hadronic corrections to the muon g-2
• Dispersion relation for hadronic light-by-light scattering: two-pion contributions
• The hadronic light-by-light scattering contribution to the muon anomalous magnetic moment from lattice QCD
• Three-pion contribution to hadronic vacuum polarization
• Dispersion relation for hadronic light-by-light scattering: pion pole
• Explaining $h\to {\mu }^{\pm }{\tau }^{\mp }$, $B\to K^{\ast }{\mu }^{+}{\mu }^{-}$ and $B\to K{\mu }^{+}{\mu }^{-}/B\to K{e}^{+}{e}^{-}$ in a two-Higgs-doublet model with gauged $L_{\mu }-L_{\tau }$
• Pseudoscalar-pole contribution to the $(g_{\mu }-2)$: a rational approach
• Dressing L_mu - L_tau in Color
• Short-distance constraints for the HLbL contribution to the muon anomalous magnetic moment
• Update of the global electroweak fit and constraints on two-Higgs-doublet models
• Lattice calculation of the pion transition form factor with $N_f=2+1$ Wilson quarks
• Test of lepton universality in beauty-quark decays
• Effective field theory approach to $b\to s\ell {\ell }^{(\prime )}$, $B\to K^{(\ast )}\nu \bar{\nu }$ and $B\to D^{(\ast )}\tau \nu$ with third generation couplings
• Addressing the LHC flavour anomalies with horizontal gauge symmetries
• Anomalies in $B$-decays and $U(2)$ flavour symmetry
• Vector leptoquark resolution of $R_K$ and $R_{D^{(\ast )}}$ puzzles
• Flavour anomalies after the $R_{K^{\ast }}$ measurement
• Longitudinal short-distance constraints for the hadronic light-by-light contribution to $(g-2{)}_{\mu }$ with large-$N_c$ Regge models
• $B$ Meson Anomalies in a Pati-Salam Model within the Randall-Sundrum Background
• A model of vector leptoquarks in view of the $B$-physics anomalies
• Non-abelian gauge extensions for B-decay anomalies
• Importance of Loop Effects in Explaining the Accumulated Evidence for New Physics in B Decays with a Vector Leptoquark
• Hadronic vacuum polarization: $(g-2{)}_{\mu }$ versus global electroweak fits
• The muon $g$-2 and $\Delta \alpha$ connection
• Lepton-flavour violating $B$ decays in generic $Z^{\prime }$ models
• Study of the rare decays of $B_s^0$ and $B^0$ mesons into muon pairs using data collected during 2015 and 2016 with the ATLAS detector
• Search for B --> K(*) nu nubar and invisible quarkonium decays
• B-decay Anomalies in a Composite Leptoquark Model
• Quark Flavor Phenomenology of the QCD Axion
• Family non-universal Z' models with protected flavor-changing interactions
• Lepton Flavor Non-Universality in B-meson Decays from a U(2) Flavor Model
• An explicit Z'-boson explanation of the B->K*mu+mu- anomaly
• Simultaneous Explanation of the $R_K$ and $R_{D^{(\ast )}}$ Puzzles: a Model Analysis
• Search for $\mathbf{B}\to \mathbf{h\nu }\bar{\mathbf{\nu }}$ decays with semileptonic tagging at Belle
• Dark forces coupled to non-conserved currents
• Leptoquark Flavor Patterns & B Decay Anomalies
• Left-handed Z' and Z FCNC quark couplings facing new b -> s mu^+ mu^- data
• Branching fraction measurements of the rare $B_s^0\to \varphi {\mu }^{+}{\mu }^{-}$ and $B_s^0\to f_2^{\prime }(1525){\mu }^{+}{\mu }^{-}$ decays
• Phenomenology of an $SU(2)\times SU(2)\times U(1)$ model with lepton-flavour non-universality
• The muon g-2 and the bounds on the Higgs boson mass
• On minimal Z' explanations of the B->K*mu+mu- anomaly
• $B\to K{l}^{+}{l}^{-}$ decay form factors from three-flavor lattice QCD
• Violation of lepton flavour universality in composite Higgs models
• Lepton Flavor Non-Universality in B decays from Dynamical Yukawas
• Revisiting the vector leptoquark explanation of the B-physics anomalies
• Combined Explanations of the $b\to s{\mu }^{+}{\mu }^{-}$ and $b\to c{\tau }^{-}\bar{\nu }$ Anomalies: a General Model Analysis
• Low-energy signatures of the ${\mathrm{PS}}^3$ model: from $B$-physics anomalies to LFV
• Implications of new evidence for lepton-universality violation in $b\to s{\ell }^{+}{\ell }^{-}$ decays
• Low-energy phenomenology of scalar leptoquarks at one-loop accuracy
• Angular analysis of the $B^{+}\to K^{\ast +}{\mu }^{+}{\mu }^{-}$ decay
• A New Light Particle in B Decays?
• Search for Axion-Like Particles produced in $e^{+}{e}^{-}$ collisions at Belle II
• Generic Loop Effects of New Scalars and Fermions in $b\to s{\ell }^{+}{\ell }^{-}$, $(g-2{)}_{\mu }$ and a Vector-like $4^{\mathrm{th}}$ Generation
• $b\to s\ell \ell$ Global Fits after $R_{K_S}$ and $R_{K^{\ast +}}$
• Tests of lepton universality using $B^0\to K_S^0{\ell }^{+}{\ell }^{-}$ and $B^{+}\to K^{\ast +}{\ell }^{+}{\ell }^{-}$ decays
• Minimal flavor-changing $Z^{\prime }$ models and muon $g-2$ after the $R_{K^{\ast }}$ measurement
• More Indications for Lepton Nonuniversality in $b\to s{\ell }^{+}{\ell }^{-}$
• A $L_{\mu }-L_{\tau }$ theory of Higgs flavor violation and $(g-2{)}_{\mu }$
• Loop effects of heavy new scalars and fermions in $b\to s{\mu }^{+}{\mu }^{-}$
• Anomaly-free local horizontal symmetry and anomaly-full rare B-decays
• Measurement of properties of B${}_{\mathrm{s}}^0\to {\mu }^{+}{\mu }^{-}$ decays and search for B${}^0\to {\mu }^{+}{\mu }^{-}$ with the CMS experiment
• Linear flavour violation and anomalies in B physics
• Lepton Flavor and Non-Universality from Minimal Composite Higgs Setups
• Flavor Physics and Flavor Anomalies in Minimal Fundamental Partial Compositeness
• LHCb anomaly and $B$ physics in flavored Z${}^{\prime }$ models with flavored Higgs doublets
• New light mediators for the $R_K$ and $R_{K^{\ast }}$ puzzles
• $b\to s{\ell }^{+}{\ell }^{-}$ Transitions in Two-Higgs-Doublet Models
• A Model of Muon Anomalies
• Implications for New Physics in $b\to s\mu \mu$ transitions after recent measurements by Belle and LHCb
• Complete Vector-like Fourth Family and new $\mathrm{U}(1{)}^{\prime }$ for Muon Anomalies
• Flavourful $Z^{\prime }$ portal for vector-like neutrino Dark Matter and $R_{K^{(\ast )}}$
• Combined explanations of $(g-2{)}_{\mu }$, $R_{D^{(\ast )}}$, $R_{K^{(\ast )}}$ anomalies in a two-loop radiative neutrino mass model
• Explaining $b\to s{\ell }^{+}{\ell }^{-}$ and the Cabibbo Angle Anomaly with a Vector Triplet
• Neutrino mixing and $R_K$ anomaly in $U(1{)}_X$ models: a bottom-up approach
• $Z^{\prime }$ models with less-minimal flavour violation
• A "Vector-like chiral" fourth family to explain muon anomalies
• $R_2$ as a single leptoquark solution to $R_{D^{(\ast )}}$ and $R_{K^{(\ast )}}$
• Flavourful $Z^{\prime }$ models for $R_{K^{(\ast )}}$
• Vector Leptoquarks Beyond Tree Level
• QCD Improved Matching for Semi-Leptonic B Decays with Leptoquarks
• Search for $B^{+}\to K^{+}\nu \bar{\nu }$ decays using an inclusive tagging method at Belle II
• Correlating Lepton Flavour (Universality) Violation in $B$ Decays with $\mu \to e\gamma$ using Leptoquarks
• Third Family Hypercharge Model for $R_{K^{(\ast )}}$ and Aspects of the Fermion Mass Problem
• LHCb anomalies from a natural perspective
• Gauging the accidental symmetries of the Standard Model, and implications for the flavour anomalies
• $R_{K^{(\ast )}}$ and related $b\to s\ell \bar{\ell }$ anomalies in minimal flavor violation framework with $Z^{\prime }$ boson
• Effective Theory Approach to New Physics with Flavour: General Framework and a Leptoquark Example
• Global Analysis of Leptophilic Z' Bosons
• Muonic Force Behind Flavor Anomalies
• Flavor Anomalies in Heavy Quark Decays
• Combined Explanation of the $Z\to b\bar{b}$ Forward-Backward Asymmetry, the Cabibbo Angle Anomaly, $\tau \to \mu \nu \nu$ and $b\to s{\ell }^{+}{\ell }^{-}$ Data
• A Common Origin of Neutrino Masses and $R_{D^{(\ast )}}$, $R_{K^{(\ast )}}$ Anomalies
• A minimal $U(1{)}^{\prime }$ extension of MSSM in light of the B decay anomaly
• Search for an invisibly decaying $Z^{\prime }$ boson at Belle II in $e^{+}{e}^{-}\to {\mu }^{+}{\mu }^{-}(e^{\pm }{\mu }^{\mp })$ plus missing energy final states
• Simplified Models of Flavourful Leptoquarks
• Naturalising the Third Family Hypercharge Model for Neutral Current $B-$Anomalies
• Light Resonances and the Low-$q^2$ Bin of $R_{K^{\ast }}$
• Mounting Evidence for the Violation of Lepton Flavor Universality
• $R_{D^{(\ast )}}$, $R_{K^{(\ast )}}$ and neutrino mass in the 2HDM-III with right-handed neutrinos
• $R_{K^{(\ast )}}$ and the origin of Yukawa couplings
• Complete Vector-like Fourth Family with ${\mathrm{U}(1)}^{\prime }$: A Global Analysis
• On the significance of new physics in $b\to s{\ell }^{+}{\ell }^{-}$ decays
• Stringy explanation of $b\to s{\ell }^{+}{\ell }^{-}$ anomalies
• On Light Resonance Interpretations of the B Decay Anomalies
• Connecting $b\to s\ell \bar{\ell }$ anomalies to enhanced rare nonleptonic ${\bar{B}}_s^0$ decays in $Z^{\prime }$ model
• Lepton non-universality in $B$ decays and fermion mass structure
• Exploring dark matter, neutrino mass and $R_{K^{(\ast )},\varphi }$ anomalies in $L_{\mu }-L_{\tau }$ model
• Anomalous $Z^{\prime }$ bosons for anomalous $B$ decays
• $U(1{)}_{B_3-L_2}$ Explanation of the Neutral Current $B-$Anomalies
• Common explanation to the $R_{K^{(\ast )}}$, $R_{D^{(\ast )}}$ and ${\epsilon }^{\prime }/\epsilon$ anomalies in a 3HDM+${\nu }_R$ and connections to neutrino physics
• Low Scale $U(1{)}_X$ Gauge Symmetry as an Origin of Dark Matter, Neutrino Mass and Flavour Anomalies
• A gauged horizontal $SU(2)$ symmetry and $R_{K^{(\ast )}}$
• Identifying a $Z^{\prime }$ behind $b\to s\ell \ell$ anomalies at the LHC
• A model for the Singlet-Triplet Leptoquarks
• $B$ decay anomalies from nonabelian local horizontal symmetry
• Flavour anomalies and the muon $g-2$ from feebly interacting particles
• Recent $\mathbf{B}$ Physics Anomalies - a First Hint for Compositeness?
• Global Fits of Third Family Hypercharge Models to Neutral Current B-Anomalies and Electroweak Precision Observables
• Finite Family Groups for Fermionic and Leptoquark Mixing Patterns
• Large Hadron Collider Constraints on Some Simple $Z^{\prime }$ Models for $b\to s{\mu }^{+}{\mu }^{-}$ Anomalies
• Quark-Lepton Connections in $Z^{\prime }$ Mediated FCNC Processes: Gauge Anomaly Cancellations at Work
• Associated $Z^{\prime }$ production in the flavorful $U(1)$ scenario for $R_{K^{(\ast )}}$
• Implication of family non-universal $Z^{\prime }$ model to rare exclusive $b\to s(l\bar{l},\nu \bar{\nu })$ transitions
• Lepton Flavor Violation in a $Z^{\prime }$ model for the $b\to s$ anomalies
• Implications of light $Z^{\prime }$ on semileptonic $B(B_s)\to T\{K_2^{\ast }(1430)$ $(f_2^{\prime }(1525))\}{\ell }^{+}{\ell }^{-}$ decays at large recoil

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• Search for an invisible $Z^{\prime }$ in a final state with two muons and missing energy at Belle II
• Width effects of broad new resonances in loop observables and application to $(g-2{)}_{\mu }$
• Search for a ${\tau }^{+}{\tau }^{-}$ resonance in $e^{+}{e}^{-}\to {\mu }^{+}{\mu }^{-}{\tau }^{+}{\tau }^{-}$ events with the Belle II experiment
• Neutrinophilic DM annihilation in a model with $U(1{)}_{L_{\mu }-L_{\tau }}\times U(1{)}_H$ gauge symmetry
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