Revisiting the Dark Photon Explanation of the Muon Anomalous Magnetic Moment

Abstract

A massive $U(1{)}^{\prime }$ gauge boson known as a "dark photon" or $A^{\prime }$, has long been proposed as a potential explanation for the discrepancy observed between the experimental measurement and theoretical determination of the anomalous magnetic moment of the muon, ($g_{\mu }-2$) anomaly. Recently, experimental results have excluded this possibility for a dark photon exhibiting exclusively visible or invisible decays. In this work, we revisit this idea and consider a model where $A^{\prime }$ couples inelastically to dark matter and an excited dark sector state, leading to a more exotic decay topology we refer to as a semi-visible decay. We show that for large mass splittings between the dark sector states this decay mode is enhanced, weakening the previous invisibly decaying dark photon bounds. As a consequence, $A^{\prime }$ resolves the $g_{\mu }-2$ anomaly in a region of parameter space the thermal dark matter component of the Universe is readily explained. Interestingly, it is possible that the semi-visible events we discuss may have been vetoed by experiments searching for invisible dark photon decays. A re-analysis of the data and future searches may be crucial in uncovering this exotic decay mode or closing the window on the dark photon explanation of the $g_{\mu }-2$ anomaly.

arXiv comment5 pages + references, 3 figures

References in corpus (45)

• Planck 2015 results. XIII. Cosmological parameters
• FeynRules 2.0 - A complete toolbox for tree-level phenomenology
• MadGraph 5 : Going Beyond
• Final Report of the Muon E821 Anomalous Magnetic Moment Measurement at BNL
• The BABAR Detector
• New Measurement of the Electron Magnetic Moment and the Fine Structure Constant
• Measurement of the fine-structure constant as a test of the Standard Model
• Inelastic Dark Matter
• Secluded U(1) below the weak scale
• The muon $g-2$ and $\alpha (M_Z^2)$: a new data-based analysis
• Search for a dark photon in e+e- collisions at BABAR
• The Muon Anomalous Magnetic Moment: A Harbinger For "New Physics"
• Tenth-Order QED Contribution to the Electron g-2 and an Improved Value of the Fine Structure Constant
• Illuminating Dark Photons with High-Energy Colliders
• Calculation of the hadronic vacuum polarization contribution to the muon anomalous magnetic moment
• Cavity Control of a Single-Electron Quantum Cyclotron:\\Measuring the Electron Magnetic Moment
• Search for Invisible Decays of a Dark Photon Produced in e+e- Collisions at BaBar
• U-boson production in e+e- annihilations, psi and Upsilon decays, and Light Dark Matter
• Serendipity in dark photon searches
• Revised and Improved Value of the QED Tenth-Order Electron Anomalous Magnetic Moment
• Strong Constraints on Sub-GeV Dark Matter from SLAC Beam Dump E137
• Observing a light dark matter beam with neutrino experiments
• Dark Matter, Millicharges, Axion and Scalar Particles, Gauge Bosons, and Other New Physics with LDMX
• Search for light massive gauge bosons as an explanation of the $(g-2{)}_{\mu }$ anomaly at MAMI
• Constraining Light Dark Matter with Low-Energy e+e- Colliders
• Accelerating the Discovery of Light Dark Matter
• New Electron Beam-Dump Experiments to Search for MeV to few-GeV Dark Matter
• Dark Matter Search in Nucleon, Pion, and Electron Channels from a Proton Beam Dump with MiniBooNE
• Search for pair and single production of vectorlike quarks in final states with at least one $Z$ boson decaying into a pair of electrons or muons in $pp$ collision data collected with the ATLAS detector at $\sqrt{s}=13$ TeV
• Light spin-1/2 or spin-0 Dark Matter particles
• Search for invisible decays of sub-GeV dark photons in missing-energy events at the CERN SPS
• Light dark matter in neutrino beams: production modelling and scattering signatures at MiniBooNE, T2K and SHiP
• Discovering Inelastic Thermal-Relic Dark Matter at Colliders
• Inelastic Dark Matter at the LHC Lifetime Frontier: ATLAS, CMS, LHCb, CODEX-b, FASER, and MATHUSLA
• A Tale of Two Anomalies
• Testing Light Dark Matter Coannihilation With Fixed-Target Experiments
• Dark Matter Search in a Proton Beam Dump with MiniBooNE
• Testing GeV-Scale Dark Matter with Fixed-Target Missing Momentum Experiments
• Light dark Higgs boson in minimal sub-GeV dark matter scenarios
• Signatures of Pseudo-Dirac Dark Matter at High-Intensity Neutrino Experiments
• New Limits on Light Hidden Sectors from Fixed-Target Experiments
• Hunting sub-GeV dark matter with NO$\nu$A near detector
• Signatures of dark Higgs boson in light fermionic dark matter scenarios
• Track Finding Efficiency in BaBar
• Finite-volume correction on the hadronic vacuum polarization contribution to muon g-2 in lattice QCD

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• The Present and Future Status of Heavy Neutral Leptons
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• Exploring properties of long-lived particles in inelastic dark matter models at Belle II
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• Phenomenology of CP-even ALP
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• Heavy long-lived coannihilation partner from inelastic Dark Matter model and its signatures at the LHC
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• The muon g-2 anomaly confronts new physics in $e^{\pm }$ and ${\mu }^{\pm }$ final states scattering
• Requirements on common solutions to the LSND and MiniBooNE excesses: a post-MicroBooNE study
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• Unlocking the Inelastic Dark Matter Window with Vector Mediators
• Connecting $(g-2{)}_{\mu }$ to neutrino mass in the extended neutrinophilic 2HDM
• Sensitivity improvement in hidden photon detection using resonant cavities
• Probing an intrinsically flavorful ALP via tau-lepton flavor physics
• IceCube and the origin of ANITA-IV events
• Multicomponent scalar dark matter at high-intensity proton beam experiments
• Semi-visible dark photon in a model with vector-like leptons for the $(g-2{)}_{e,\mu }$ and $W$-boson mass anomalies
• Inelastic Dark Matter at the Fermilab Short Baseline Neutrino Program
• Multi-track Displaced Vertices at B-Factories
• From oversimplified to overlooked: the case for exploring Rich Dark Sectors
• New Physics Searches at Kaon and Hyperon Factories
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• Search for Dark Photons in Rare $Z$ Boson Decays with the ATLAS Detector
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• Probing the explanation of the muon (g-2) anomaly and thermal light dark matter with the semi-visible dark photon channel
• Probing inelastic sub-GeV dark matter at the DUNE near detector