Flavour alignment of New Physics in light of the $(g-2{)}_{\mu }$ anomaly

Abstract

We investigate the flavour alignment conditions that New Physics (NP) models need to satisfy in order to address the $(g-2{)}_{\mu }$ anomaly and, at the same time, be consistent with the tight bounds from $\mu \to e\gamma$ and $\tau \to \mu \gamma$. We analyse the problem in general terms within the SMEFT, considering the renormalisation group evolution of all the operators involved. We show that semileptonic four-fermion operators, which are likely to generate a sizeable contribution to the $(g-2{)}_{\mu }$ anomaly, need to be tightly aligned to the lepton Yukawa couplings and the dipole operators in flavour space. While this tuning can be achieved in specific NP constructions, employing particular dynamical assumptions and/or flavour symmetry hypotheses, it is problematic in a wide class of models with broken flavour symmetries, such as those proposed to address both charged- and neutral-current $B$ anomalies. We quantify this tension both in general terms, and in the context of explicit NP constructions.

References in corpus (52)

• Dimension-Six Terms in the Standard Model Lagrangian
• The anomalous magnetic moment of the muon in the Standard Model
• Renormalization Group Evolution of the Standard Model Dimension Six Operators III: Gauge Coupling Dependence and Phenomenology
• Leading hadronic contribution to the muon magnetic moment from lattice QCD
• Renormalization Group Evolution of the Standard Model Dimension Six Operators II: Yukawa Dependence
• Renormalization Group Evolution of the Standard Model Dimension Six Operators I: Formalism and lambda Dependence
• Complete Tenth-Order QED Contribution to the Muon g-2
• Refinements in electroweak contributions to the muon anomalous magnetic moment
• 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
• Two-pion contribution to hadronic vacuum polarization
• The electroweak contributions to (g-2)_μ after the Higgs boson mass measurement
• Three-pion contribution to hadronic vacuum polarization
• Flavor Violating Higgs Decays
• Anomalies in $B$-decays and $U(2)$ flavour symmetry
• A three-site gauge model for flavor hierarchies and flavor anomalies
• U(2) and Minimal Flavour Violation in Supersymmetry
• Flavour-Changing Decays of a 125 GeV Higgs-like Particle
• Flavour physics from an approximate U(2)^3 symmetry
• DsixTools: The Standard Model Effective Field Theory Toolkit
• Axion-like particles, lepton-flavor violation and a new explanation of $a_{\mu }$ and $a_e$
• Contributions of axion-like particles to lepton dipole moments
• Hunting for ALPs with Lepton Flavor Violation
• Reading the footprints of the B-meson flavor anomalies
• Matching scalar leptoquarks to the SMEFT at one loop
• With or without U(2)? Probing non-standard flavor and helicity structures in semileptonic B decays
• Muon $g-2$ and scalar leptoquark mixing
• Flavour symmetries in the SMEFT
• Effective field theory interpretation of lepton magnetic and electric dipole moments
• Flavor hierarchies from dynamical scales
• Muon $g-2$ and $B$-anomalies from Dark Matter
• A Model of Muon Anomalies
• Semi-leptonic $B$-physics anomalies: a general EFT analysis within $U(2{)}^n$ flavor symmetry
• Hadronic vacuum polarization and vector-meson resonance parameters from $e^{+}{e}^{-}\to {\pi }^0\gamma$
• Neutrino masses and LFV from minimal breaking of U(3)^5 and U(2)^5 flavor symmetries
• A Minimal Explanation of Flavour Anomalies: B-Meson Decays, Muon Magnetic Moment, and the Cabibbo Angle
• Probing the muon g-2 anomaly with the Higgs boson at a Muon Collider
• Challenges for an axion explanation of the muon $g-2$ measurement
• Exponentially spread dynamical Yukawa couplings from non-perturbative chiral symmetry breaking in the dark sector
• FCNC decays of SM fermions into a dark photon
• The Tiny (g-2) Muon Wobble from Small-$\mu$ Supersymmetry
• Leptoquark Option for $B$-meson Anomalies and Leptonic Signatures
• Interplay of New Physics Effects in $(g-2{)}_{\ell }$ and $h\to {\ell }^{+}{\ell }^{-}$ -- Lessons from SMEFT
• Anomalous $Z^{\prime }$ bosons for anomalous $B$ decays
• Stability of the Higgs Sector in a Flavor-Inspired Multi-Scale Model
• Universal Scalar Leptoquark Action for Matching
• Explaining $(g-2{)}_{\mu }$ with Multi-TeV Sleptons
• What is the scale of new physics behind the muon $g-2$?
• Semi-secretly interacting ALP as an explanation of Fermilab muon $g-2$ measurement
• Radiative lepton mass and muon $g-2$ with suppressed lepton flavor and CP violations
• A view of flavour physics in 2021
• Naturalness of lepton non-universality and muon g-2

Cited by in corpus (8)

• The Standard Model effective field theory at work
• Adding Flavor to the SMEFT
• On $(g-2{)}_{\mu }$ From Gauged $\mathrm{U}(1{)}_X$
• Indirect constraints on lepton-flavour-violating quarkonium decays
• The Muon Magnetic Moment and Physics Beyond the Standard Model
• Froggatt-Nielsen Meets the SMEFT
• Correlating $0\nu \beta \beta$ decays and flavor observables in leptoquark models
• Explaining lepton-flavor non-universality and self-interacting dark matter with $L_{\mu }-L_{\tau }$