Minimal flavor-changing $Z^{\prime }$ models and muon $g-2$ after the $R_{K^{\ast }}$ measurement

Abstract

There has been a steady interest in flavor anomalies and their global fits as ideal probes of new physics. If the anomalies are real, one promising explanation is a new $Z^{\prime }$ gauge boson with flavor-changing coupling to bottom and strange quarks and a flavor-conserving coupling to muons and, possibly, electrons. We point out that direct production of such a $Z^{\prime }$, emerging from the collision of $b$ and $s$ quarks, may offer a complementary window into these phenomena because collider searches already provide competitive constraints. On top of that, we analyse the same $Z^{\prime }$ scenario in relation to another long-standing discrepancy between theory and experiment that concerns the anomalous magnetic moment of the muon. By scanning the allowed $Z^{\prime }$ coupling strengths in the low-mass region, we assess the compatibility of the signals from LHCb with the $Z^{\prime }$ searches in the high energy LHC data and the measurements of the anomalous magnetic moment of the involved leptons. We also argue that observations of the latter can break the degeneracy pattern in the Wilson coefficients $C_9$ and $C_{10}$ presented by LHCb data. The $Z^{\prime }$ model we consider is compatible with the new measurement of $R_{K^{\ast }}$, therefore it can potentially account for the long-standing deviations observed in $B$-physics.

13 pages, 5 figures. Missing factors corrected in eqs. 2.7-2.9 with slight updates in fig. 2

References in corpus (20)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• Test of lepton universality using $B^{+}\to K^{+}{\ell }^{+}{\ell }^{-}$ decays
• Test of lepton universality with $B^0\to K^{\ast 0}{\ell }^{+}{\ell }^{-}$ decays
• 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 $L_{\mu }-L_{\tau }$
• Patterns of New Physics in $b\to s{\ell }^{+}{\ell }^{-}$ transitions in the light of recent data
• Addressing the LHC flavour anomalies with horizontal gauge symmetries
• Flavour anomalies after the $R_{K^{\ast }}$ measurement
• Interpreting Hints for Lepton Flavor Universality Violation
• Measurement of the $B_s^0\to {\mu }^{+}{\mu }^{-}$ branching fraction and effective lifetime and search for $B^0\to {\mu }^{+}{\mu }^{-}$ decays
• Towards the discovery of new physics with lepton-universality ratios of $b\to s\ell \ell$ decays
• On the impact of power corrections in the prediction of B->K*mu+mu- observables
• $R_K$ and $R_{K^{\ast }}$ beyond the Standard Model
• Hint of Lepton Flavour Non-Universality in $B$ Meson Decays
• Angular analysis of $B_d^0\to K^{\ast }{\mu }^{+}{\mu }^{-}$ decays in $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector
• Gauge-invariant implications of the LHCb measurements on Lepton-Flavour Non-Universality
• $\text{HEPfit}$: a Code for the Combination of Indirect and Direct Constraints on High Energy Physics Models
• LHCb anomaly and $B$ physics in flavored Z${}^{\prime }$ models with flavored Higgs doublets
• LHCb anomalies from a natural perspective
• On Flavourful Easter eggs for New Physics hunger and Lepton Flavour Universality violation
• Tests for CPT sum rule and U-spin violation in Time-dependent CP violation of $B_s^0\to K^{+}{K}^{-}$ and $B_d^0\to {\pi }^{+}{\pi }^{-}$

Cited by in corpus (50)

• A model of vector leptoquarks in view of the $B$-physics anomalies
• New Physics in $b\to s{\mu }^{+}{\mu }^{-}$ after the Measurement of $R_{K^{\ast }}$
• New Physics in $b\to s{\ell }^{+}{\ell }^{-}$ confronts new data on Lepton Universality
• One constraint to kill them all?
• 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
• New light mediators for the $R_K$ and $R_{K^{\ast }}$ puzzles
• Implications for New Physics in $b\to s\mu \mu$ transitions after recent measurements by Belle and LHCb
• Minimal unified resolution to $R_{K^{(\ast )}}$ and $R(D^{(\ast )})$ anomalies with lepton mixing
• Explaining $b\to s{\ell }^{+}{\ell }^{-}$ and the Cabibbo Angle Anomaly with a Vector Triplet
• $Z^{\prime }$ models with less-minimal flavour violation
• Dark matter contribution to $b\to s{\mu }^{+}{\mu }^{-}$ anomaly in local $U(1{)}_{L_{\mu }-L_{\tau }}$ model
• flavio: a Python package for flavour and precision phenomenology in the Standard Model and beyond
• New physics and tau $g-2$ using LHC heavy ion collisions
• $R_{K^{(\ast )}}$ and related $b\to s\ell \bar{\ell }$ anomalies in minimal flavor violation framework with $Z^{\prime }$ boson
• Global Analysis of Leptophilic Z' Bosons
• Charming new physics in rare B-decays and mixing?
• 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
• Collider Constraints on $Z^{\prime }$ Models for Neutral Current $B-$Anomalies
• Impact of the $b\to sll$ anomalies on dark matter physics
• A minimal flavored $U(1{)}^{\prime }$ for $B$-meson anomalies
• $R_{K^{(\ast )}}$ and the origin of Yukawa couplings
• Scrutinizing $R$-parity violating interactions in light of $R_{K^{(\ast )}}$ data
• Flavor Non-universality Gauge Interactions and Anomalies in B-Meson Decays
• $R(K^{(\ast )})$ from dark matter exchange
• $R_K$ and $R_{K^{\ast }}$ in an Aligned 2HDM with Right-Handed Neutrinos
• Resolving the $(g-2{)}_{\mu }$ and $B$ anomalies with leptoquarks and a dark Higgs boson
• Bottom-quark Fusion Processes at the LHC for Probing $Z^{\prime }$ Models and B-meson Decay Anomalies
• Connecting $b\to s\ell \bar{\ell }$ anomalies to enhanced rare nonleptonic ${\bar{B}}_s^0$ decays in $Z^{\prime }$ model
• 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
• Identifying a $Z^{\prime }$ behind $b\to s\ell \ell$ anomalies at the LHC
• Dark matter for $b\to s{\mu }^{+}{\mu }^{-}$ anomaly in a gauged $U(1{)}_X$ model
• $R_K$ anomalies and simplified limits on $Z^{\prime }$ models at the LHC
• Unified Explanation of the Anomalies in Semi-Leptonic $B$ decays and the $W$ Mass
• $R_{K^{(\ast )}}$ and $R(D^{(\ast )})$ anomalies resolved with lepton mixing
• Hadron Collider Sensitivity to Fat Flavourful $Z^{\prime }$s for $R_{K^{(\ast )}}$
• Constraints on $Z^{\prime }$ solutions to the flavor anomalies with trans-Planckian asymptotic safety
• Towards excluding a light $Z^{\prime }$ explanation of $b\to s{\ell }^{+}{\ell }^{-}$
• Impact of vector leptoquark on $\bar{B}\to {\bar{K}}^{\ast }{l}^{+}{l}^{-}$ anomalies
• Non-universal Z' from SO(10) GUTs with vector-like family and the origin of neutrino masses
• $(g-2{)}_{\mu }$ Versus Flavor Changing Neutral Current Induced by the Light $(B-L{)}_{\mu \tau }$ Boson
• Implications of the $R_K$ and $R_{K^{\ast }}$ anomalies
• Anomalies in $b\to s$ transitions and dark matter
• $b\to s{\mu }^{+}{\mu }^{-}$ anomalies and related phenomenology in $U(1{)}_{B_3-x_{\mu }{L}_{\mu }-x_{\tau }{L}_{\tau }}$ flavor gauge models
• 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
• Electromagnetic corrections to the hadronic vacuum polarization of the photon within QED${}_{\mathrm{L}}$ and QED${}_{\mathrm{M}}$
• Strategy to measure tau $g-2$ via photon fusion in LHC proton collisions
• Analysis of Angular Observables of ${\Lambda }_b\to \Lambda (\to p\pi ){\mu }^{+}{\mu }^{-}$ Decay in Standard and $Z^{\prime }$ Models
• Explaining the $b\to s{\ell }^{+}{\ell }^{-}$ anomalies in $Z^{\prime }$ scenarios with top-FCNC couplings
• Leptonic Operators for Cabbibo Angle Anomaly with SMEFT RG Evolution
• Theoretical implications of recent heavy flavour measurements at the LHC