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New Fixed-Target Experiments to Search for Dark Gauge Forces
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Fixed-target experiments are ideally suited for discovering new MeV-GeV mass U(1) gauge bosons through their kinetic mixing with the photon. In this paper, we identify the production and decay properties of new light gauge bosons that dictate fixed-target search strategies. We summarize existing limits and suggest five new experimental approaches that we anticipate can cover most of the natural parameter space, using currently operating GeV-energy beams and well-established detection methods. Such experiments are particularly timely in light of recent terrestrial and astrophysical anomalies (PAMELA, FERMI, DAMA/LIBRA, etc.) consistent with dark matter charged under a new gauge force.
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Cited by 30 Pith papers
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Cooling the Shock: New Supernova Constraints on Dark Photons
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The Price of Tiny Kinetic Mixing
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Updated E141 constraints on a long-lived $X_{17}$ vector boson
A refined simulation of SLAC E141 shows the experiment's old exclusion region does not cover the 16.9 MeV X17, leaving a window at ε_e between 6.5e-5 and 1.1e-4.
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Probing Dark Photons from Nuclear De-excitation in Reactor Neutrino Experiment
Nuclear de-excitation in reactors produces on-shell dark photons up to nuclear transition energies, yielding stronger TEXONO limits on ε than Compton-like production for 0.1 MeV < m_A' < 6.9 MeV.
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Flavor specific chiral $U(1)_X$ framework for explaining the ATOMKI anomaly
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One-loop corrections to W/Z/h leptonic widths exclude heavy leptophilic Z' regions (M ≳ O(1) TeV, g' ≳ 0.4) beyond LEP-2 and neutrino-trident limits.
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Light Vector Dark Matter via a Magnetic Dipole Portal: Bridging Direct Detection and Fixed-Target Searches
A sub-GeV vector DM model with a magnetic dipole portal is studied at LDMX/NA64, but the claimed viable region relies on an unjustified thermal equilibrium assumption.
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Filling the Gap: Hunting for Vector Bosons at the MUonE Experiment with Displaced Decay Signature
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The bremsstrahlung-like production of the massive spin-2 dark matter mediator
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Bounds on new neutrino interactions from the first CE$\nu$NS data at direct detection experiments
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The High-Energy Frontier of the Intensity Frontier: Closing the Dark Photon, Inelastic Dark Matter, and Muon g-2 Windows
Reanalysis of CHARM and NuCal beam-dump data nearly excludes inelastic dark matter as a full-abundance thermal relic in the MeV to GeV range for the benchmark splittings considered, and yields updated dark photon constraints.
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Dark CP Violation and Gauged Lepton/Baryon Number for Electroweak Baryogenesis
An electroweak baryogenesis model where dark-sector CP violation is transferred to Standard Model leptons through an anomalous U(1)_ℓ Z' background can produce the observed baryon asymmetry while evading current EDM bounds.
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New benchmarks for direct detection of freeze-in dark matter in vector portal models
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Potential for the discovery of the protophobic boson at the STCF
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Illuminating sequential freeze-in dark matter with dark photon signal at the CERN SHiP experiment
Sequential freeze-in dark matter with a dark photon mediator of mass 0.01-10 GeV fixes the dark charge at 1.3e-12 and restricts mixing to 10^{-11} to ~10^{-8}, with SHiP excluding most of this range except near 10^{-11}.
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Muon Beam Dump Experiments explicate five-dimensional nature of $U(1)_{L_{\mu}-L_{\tau}}$
Muon beam dump experiments can probe five-dimensional U(1)_{Lμ-Lτ} models via enhanced Kaluza-Klein signals, with decay channels enabling mass reconstruction to indicate extra dimensions.
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Probing Standard Model and Beyond with Reactor CE$\nu$NS Data of CONUS+ experiment
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Probing conventional and new physics at the ESS with coherent elastic neutrino-nucleus scattering
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Searching for hadronic scale baryonic and dark forces at $(g-2)_\mu$'s lattice-vs-dispersion front
A flavor-universal GeV-scale vector boson's direct contribution to (g-2)_mu cancels against its on-shell contribution to the e+e- -> hadrons data when the data-driven HVP is used, redirecting the search to the lattice...
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Dark photons and axion-like particles at the Electron-Ion Collider in China
Projected EicC searches could probe dark photons from about 1 MeV to 3 GeV and photon-coupled axion-like particles from 0.1 to 5 GeV, covering parameter space not yet excluded by other experiments.
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Search for light long-lived neutral particles produced in $pp$ collisions at $\sqrt{s} =$ 13 TeV and decaying into collimated leptons or light hadrons with the ATLAS detector
No evidence for displaced dark-photon jets is found, and 95% confidence limits exclude cross sections above about 4 pb for H to two dark photons with decay lengths from 1.5 mm to 307 mm.
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Dark Matter Energy Deposition and Production from the Table-Top to the Cosmos
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Simulation of dark photon sensitivity in $\eta \rightarrow \gamma e^+e^-$ at HIAF
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Observing Dirac neutrinos in the cosmic microwave background
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Dark Sectors from the Hidden Photon Perspective
A gauged U(1)_{Lμ−Lτ} dark sector with kinetic mixing can simultaneously accommodate the muon anomalous magnetic moment excess and the observed dark matter relic density.
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