Secluded U(1) below the weak scale

Abstract

A secluded U(1) sector with weak admixture to photons, O(10^{-2}-10^{-3}), and the scale of the breaking below 1 GeV represents a natural yet poorly constrained extension of the Standard Model. We analyze g-2 of muons and electrons together with other precision QED data, as well as radiative decays of strange particles to constrain mass--mixing angle (m_V-κ) parameter space. We point out that m_V = 214 MeV and κ^2 > 3\times 10^{-5} can be consistent with the hypothesis of HyperCP collaboration, that seeks to explain the anomalous energy distribution of muon pairs in the Σ^+ \to p μ^+μ^- process by a resonance, without direct contradiction to the existing data on radiative kaon decays. The same parameters lead to O({\rm few} \times 10^{-9}) upward correction to the anomalous magnetic moment of the muon, possibly relaxing some tension between experimental value and theoretical determinations of g-2. The ultra-fine energy resolution scan of e^+e^-\to μ^+μ^- cross section and dedicated analysis of lepton spectra from K^+\to π^+ e^+e^- decays should be able to provide a conclusive test of this hypothesis and improve the constraints on the model.

14 pages, 2 figures

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• Constraints on a New Light Spin-One Particle from Rare b -> s Transitions
• Electric Dipole Moments From Dark Sectors
• Search for Low-Mass Dark Matter at BABAR
• Constraints on Light Leptophilic Dark Matter Mediators from Decay Experiments
• Probing the Dark Axion Portal with Muon Anomalous Magnetic Moment
• Search for Lepton Flavor Violating Decay at FASER
• Probing ultra-light dark photon from inverse Compton-like scattering
• Singlet Portal to the Hidden Sector
• Hidden Photons in connection to Dark Matter
• MiXDM: Cosmic Ray Signals from Multiple States of Dark Matter
• Relic Challenges for Vector-Like Fermions as Connectors to a Dark Sector
• Sensitivity to light weakly-coupled new physics at the precision frontier
• Singlet Fermionic Dark Matter with Dark $Z$
• The Muon Magnetic Moment and Physics Beyond the Standard Model
• The interplay between SM precision, BSM physics and measurements of ${\alpha }_{\mathrm{had}}$ in $\mu$-$e$ scattering
• Signals of a New Gauge Boson from IceCube and Muon $g-2$
• Searching for Prompt and Long-Lived Dark Photons in Electro-Produced $e^{+}{e}^{-}$ Pairs with the Heavy Photon Search Experiment at JLab
• Searching for heavy neutral leptons coupled to axion-like particles at the LHC far detectors and SHiP
• Probing dark photons in the early universe with big bang nucleosynthesis
• Constraining Nonstandard Neutrino-Electron Interactions due to a New Light Spin-1 Boson
• Tests of the Atomki anomaly in lepton pair decays of heavy mesons
• Dark Matter from Dark Glueball Dominance
• Signatures of afterglows from light dark matter boosted by supernova neutrinos in current and future large underground detectors
• Constraints on the dark sector from electroweak precision observables
• Terrestrial detection of hidden vectors produced by solar nuclear reactions
• Towards UV-Models of Kinetic Mixing and Portal Matter III: Relating Portal Matter and R-H Neutrino Masses
• Light Mediators in Anomaly Free $U(1{)}_X$ Models I - Theoretical Framework
• Dark photon effect on the rare kaon decay $K_L\to {\pi }^0\nu \bar{\nu }$
• Dark forces and atomic electric dipole moments
• Higgsphobic and fermiophobic Z' as a single dark matter candidate
• (In)Direct Detection of Boosted Dark Matter
• Dark photon dark matter and fast radio bursts
• Kinetic Mixing, Dark Photons and Extra Dimensions III: Brane Localized Dark Matter
• Anomalous and axial Z' contributions to g-2
• Non-adiabatic evolution of dark sector in the presence of $U(1{)}_{L_{\mu }-L_{\tau }}$ gauge symmetry
• Time-delayed electrons from neutral currents at the LHC
• Thermal Relic of Self-Interacting Dark Matter with Retarded Decay of Mediator
• Directly detecting Isospin-Violating Dark Matter
• A Flavorful Composite Higgs Model : Connecting the B anomalies with the hierarchy problem
• Testing Parity with Atomic Radiative Capture of ${\mu }^{-}$
• Status of sub-GeV Hidden Particle Searches
• Gauge field and brane-localized kinetic terms on the chiral square
• New physics via pion capture and simple nuclear reactions
• Superradiant Searches for Dark Photons in Two Stage Atomic Transitions
• Exotic Lepton-Flavor Violating Higgs Decays
• Update on Hidden Sectors with Dark Forces and Dark Matter
• Muon ($g-2$) in $U(1{)}_{L_{\mu }-L_{\tau }}$ Scotogenic Model Extended with Vector like Fermion
• Signatures of a Flavor Changing $Z^{\prime }$ Boson in $B_q\to \gamma Z^{\prime }$
• Gauging lepton flavor SU(3) for the muon $g-2$
• First results on the performance of the PADME electromagnetic calorimeter
• The Heavy Photon Search Experiment at Jefferson Lab
• Constraints on dark matter interactions from the first results of DarkSide-50
• Hidden Interactions of Sterile Neutrinos As a Probe For New Physics
• Vector Self-Interacting Dark Matter
• MiniBooNE-DM: a dark matter search in a proton beam dump
• String (gravi)photons, "dark brane photons", holography and the hypercharge portal
• Building Kinetic Mixing From Scalar Portal Matter
• Hidden Dipole Dark Matter
• ORKA: The Golden Kaon Experiment
• Mono-$\gamma$ Production of a Vector Dark Matter at Future $e^{+}{e}^{-}$ Collider
• Unveiling Time-Varying Signals of Ultralight Bosonic Dark Matter at Collider and Beam Dump Experiments
• Dark Matter with Density-Dependent Interactions
• Constraints on dark forces from the B factories and low-energy experiments
• Search for light long-lived neutral particles from Higgs boson decays via vector-boson-fusion production from $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Searching for the light leptophilic gauge boson $Z_x$ via four-lepton final states at the CEPC
• Light gauge boson in rare $K$ decay
• Search for Inelastic Boosted Dark Matter with the ICARUS Detector at the Gran Sasso Underground National Laboratory
• Accelerator-Produced Dark Matter Search using MiniBooNE
• Relic abundance of MeV millicharged particles
• Fat brane, dark matter and localized kinetic terms in six dimensions
• Improved measurements of the Dalitz decays $\eta /{\eta }^{\prime }\to \gamma e^{+}{e}^{-}$
• TASI 2020 Lectures on Precision Tests of the Standard Model
• $(g-2{)}_{\mu }$ Versus $K\to \pi +E_{miss}$ Induced by the $(B-L{)}_{23}$ Boson
• The Bactrian Effect: Multiple Resonances and Light Dirac Dark Matter
• The KLOE-2 experiment at DAFNE
• Dark photon pair production via off-shell dark Higgs at FASER
• Semi-visible dark photon in a model with vector-like leptons for the $(g-2{)}_{e,\mu }$ and $W$-boson mass anomalies
• Multicomponent scalar dark matter at high-intensity proton beam experiments
• Leptophobic dark photon interpretation of the ${\eta }^{\left(\prime \right)}\to {\pi }^0\left(\eta \right)\gamma \gamma$ puzzle
• Searches for Light Scalars, Pseudoscalars, and Gauge Bosons
• Supersymmetry after the Higgs discovery and its LHC phenomenology
• Search for the dark photon in $B^0\to A^{\prime }{A}^{\prime }$, $A^{\prime }\to e^{+}{e}^{-}$, ${\mu }^{+}{\mu }^{-}$, and ${\pi }^{+}{\pi }^{-}$ decays at Belle
• Search for invisible dark photon in $\gamma e$ scattering at future lepton colliders
• Constraining the Secluded and Catalyzed Annihilation Dark Matter with Fermi-LAT and Planck Data
• Thermal evolution of dark matter and gravitational-wave production in the early universe from a symplectic glueball model
• DUNE potential for sub-GeV dark matter in proton beam dump mode
• Ultra-high-energy neutrino scattering in an anomalous U(1) effective field theory
• Parity Violation by a Dark Gauge Boson
• Directional Neutrino Searches for Galactic Center Dark Matter at Large Underground LArTPCs
• Multi-track Displaced Vertices at B-Factories
• Light Meson Dynamics Workshop. Mini proceedings
• Leptomeson contribution to the muon g-2
• Searching for the dark photon at the Future Circular Lepton Collider
• Search for light neutral particles decaying promptly into collimated pairs of electrons or muons in $pp$ collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector
• Radiation back-reaction during dark-matter freeze-out via metastable bound states
• SPIN Effects, QCD, and Jefferson Laboratory with 12 GeV electrons
• Illuminating long-lived dark vector bosons via exotic Higgs decays at $\sqrt{s}=13\text{TeV}$
• New Physics Searches at Kaon and Hyperon Factories
• Mixing Particle Production for Relaxion Mechanism
• The Forward Physics Facility at the High-Luminosity LHC
• Scientific Opportunities at the ARIEL Electron Linac
• The Dark Z and Charged Higgs Decay
• Constraining EDM and MDM lepton dimension five interactions in the electroweak sector
• Semi-Visible Dark Photon Phenomenology at the GeV Scale
• Production and constraints for a massive dark photon at electron-positron colliders
• Novel Search for Light Dark Photon in the Forward Experiments at the LHC
• Charting the new physics through one-loop effects in the muon magnetic dipole moment
• Impacts of ALP on the Constraints of Dark Photon
• Hybrid Type-II and Type-III seesaw model for the muon $g-2$ anomaly
• A simple extension of SM that can explain the $(g-2{)}_{\mu }$ anomaly, small neutrino mass and a dark-matter
• Observation of the very rare ${\Sigma }^{+}\to p{\mu }^{+}{\mu }^{-}$ decay
• Constraints on Kinetic Mixing of Dark Photons from Dilepton Spectra
• Reheating after the Supercooled Phase Transitions with Radiative Symmetry Breaking
• Testing Dark Matter with the Anomalous Magnetic Moment in Quantum Electrodynamics Model
• The Muon Experimental Anomalies Are Explained by a New Interaction Proportional to Charge
• Electroweak Precision Constraints on Dark Photon Models with Generalized Mixing
• Gauge-independent Gravitational Waves from Cogenesis in a $B-L$ Conserving Universe
• Electron Beam Dump Constraints on Light Bosons with Lepton Flavor Violating Couplings
• A Direct Detection Search for Hidden Sector New Particles in the 3-60 MeV Mass Range
• Dark photon manifestation in the triplet-like QED processes $\gamma +{\ell }_i\to {\ell }_j^{+}{\ell }_j^{-}+{\ell }_i$, $i\ne j,$ $i=e,\mu ,$ $j=e,\mu ,\tau$
• Vector Portal Pseudo-Goldstone Dark Matter
• Spectroscopic Bounds on New Physics
• Fingerprints of freeze-in dark matter in an early matter-dominated era
• Probing the explanation of the muon (g-2) anomaly and thermal light dark matter with the semi-visible dark photon channel
• Dark Matter Freeze-in from a $Z^{\prime }$ Reheaton
• Phenomenology of the Sterile Neutrinos
• Light dark forces at flavor factories
• Probing the muon $g-2$ with future beam dump experiments
• Boosting (In)direct Detection of Dark Matter
• Implications of a Running Dark Photon Coupling
• Generalized Dirac duality and CP violation in a two photon theory
• Concept of Very-Asymmetric Lepton Collider for Dark Matter Search
• The Dark Photon: a 2026 Perspective
• Constraints on the $U(1{)}_{B-L}$ model from global QCD analysis
• The KLOE-2 Experiment at DAPHNE
• Searching for hadronic scale baryonic and dark forces at $(g-2{)}_{\mu }$'s lattice-vs-dispersion front
• Testing the HyperCP anomaly at LHCb: evidence for the ${\Sigma }^{+}\to p{\mu }^{+}{\mu }^{-}$ decay