A minimal dark matter model with one complex scalar carrying B and L numbers, stabilized by proton stability, with mass near the proton mass and relic density from UV freeze-in.
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Dark Sectors 2016 Workshop: Community Report
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abstract
This report, based on the Dark Sectors workshop at SLAC in April 2016, summarizes the scientific importance of searches for dark sector dark matter and forces at masses beneath the weak-scale, the status of this broad international field, the important milestones motivating future exploration, and promising experimental opportunities to reach these milestones over the next 5-10 years.
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A factorization-based method is outlined to derive energy-loss constraints on dark sector particles (spin 0 to 2) from ISR-modified lepton distributions in DIS, illustrated for MeV-GeV spin-0 cases at the EIC.
A halo-independent method using quantum sensors to probe and reconstruct the local dark matter velocity distribution from direct detection data.
Higher-order electromagnetic and hadronic contributions to dark photon bremsstrahlung have limited impact on signal and background predictions for LDMX and LOHENGRIN except for requiring an HCAL extension in LOHENGRIN to veto diffractive backgrounds.
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.
Planck CMB data set upper limits on vector and axial-vector dark matter-electron couplings for masses 100 eV to 100 keV via energy injection from inelastic scattering and hydrogen absorption.
Calculations of cLFV cross sections in eμ scattering show the e−μ+ → W+W− channel at √s > 2MW offers better prospects for detecting heavy sterile neutrinos than the quartically suppressed e−μ+ → e+μ− process.
Muon collider sensitivity to dark Z' via radiative return versus vector boson fusion allows mixing parameter extraction from relative rates.
Re-evaluation of sub-GeV Lμ-Lτ gauge boson constraints from beam-dump production modes and multiple supernova observables, highlighting differences from existing literature.
MicroBooNE sets the strongest limits to date on the Higgs-portal scalar mixing angle θ below ~3×10^{-4} for masses 110-155 MeV using kaon decays in the NuMI beam and 2.01×10^{21} POT exposure.
REDTOP targets O(10^14) eta and O(10^12) eta-prime decays to probe four hidden sector portals and test CP/T invariance plus lepton universality.
NRQCD-based study projects BESIII and STCF sensitivity to light dark photons (m_U < 3 GeV) via visible and invisible J/ψ decay channels.
LDMX can close much of the sub-100 MeV blind spot for axions and dark photons via charged track and momentum reconstruction.
A mixed portal between dark photon and ALP allows exotic A' to a gamma to 3 gamma cascades that convert long-lived states into displaced multi-photon signatures at lepton colliders.
Presents the science case, reference design, and project plan for the CMB-S4 ground-based CMB experiment.
The paper surveys theoretical motivations, experimental searches, and bounds on the dark photon as a kinetically mixed gauge boson from a dark sector, covering both massive and massless cases along with related milli-charged fermion constraints.
citing papers explorer
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Minimal Proton-Mass Dark Matter
A minimal dark matter model with one complex scalar carrying B and L numbers, stabilized by proton stability, with mass near the proton mass and relic density from UV freeze-in.
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New Energy-Loss Constraints on Dark Sectors from Deeply Inelastic Scattering with Initial State Radiation
A factorization-based method is outlined to derive energy-loss constraints on dark sector particles (spin 0 to 2) from ISR-modified lepton distributions in DIS, illustrated for MeV-GeV spin-0 cases at the EIC.
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Halo-Independent Quantum Sensor Probes of Low-Velocity Dark Matter
A halo-independent method using quantum sensors to probe and reconstruct the local dark matter velocity distribution from direct detection data.
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Theory Calculations for LDMX and LOHENGRIN beyond Coherent Bethe-Heitler Scattering
Higher-order electromagnetic and hadronic contributions to dark photon bremsstrahlung have limited impact on signal and background predictions for LDMX and LOHENGRIN except for requiring an HCAL extension in LOHENGRIN to veto diffractive backgrounds.
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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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CMB Limits on the Absorption of Light Vector and Axial-Vector Dark Matter
Planck CMB data set upper limits on vector and axial-vector dark matter-electron couplings for masses 100 eV to 100 keV via energy injection from inelastic scattering and hydrogen absorption.
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Electron-muon colliders at high energies to discover heavy sterile neutrinos
Calculations of cLFV cross sections in eμ scattering show the e−μ+ → W+W− channel at √s > 2MW offers better prospects for detecting heavy sterile neutrinos than the quartically suppressed e−μ+ → e+μ− process.
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Dark Z' at a Muon Collider: Radiative Return versus Vector Boson Fusion
Muon collider sensitivity to dark Z' via radiative return versus vector boson fusion allows mixing parameter extraction from relative rates.
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$L_\mu-L_\tau$ gauge bosons in beam dumps and supernovae
Re-evaluation of sub-GeV Lμ-Lτ gauge boson constraints from beam-dump production modes and multiple supernova observables, highlighting differences from existing literature.
-
Search for the production of Higgs-portal scalar bosons in the NuMI beam using the MicroBooNE detector
MicroBooNE sets the strongest limits to date on the Higgs-portal scalar mixing angle θ below ~3×10^{-4} for masses 110-155 MeV using kaon decays in the NuMI beam and 2.01×10^{21} POT exposure.
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Hidden-sectors search and probe of discrete symmetries at the REDTOP experiment
REDTOP targets O(10^14) eta and O(10^12) eta-prime decays to probe four hidden sector portals and test CP/T invariance plus lepton universality.
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Searching for dark photons in $J/\psi$ decays
NRQCD-based study projects BESIII and STCF sensitivity to light dark photons (m_U < 3 GeV) via visible and invisible J/ψ decay channels.
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Cornering MeV-GeV Axions and Dark Photons with LDMX
LDMX can close much of the sub-100 MeV blind spot for axions and dark photons via charged track and momentum reconstruction.
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Phenomenology of Long-Lived Dark Photons and Axion-Like Particles in a Mixed Portal Framework
A mixed portal between dark photon and ALP allows exotic A' to a gamma to 3 gamma cascades that convert long-lived states into displaced multi-photon signatures at lepton colliders.
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CMB-S4 Science Case, Reference Design, and Project Plan
Presents the science case, reference design, and project plan for the CMB-S4 ground-based CMB experiment.
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The Dark Photon
The paper surveys theoretical motivations, experimental searches, and bounds on the dark photon as a kinetically mixed gauge boson from a dark sector, covering both massive and massless cases along with related milli-charged fermion constraints.
- Probing inelastic sub-GeV dark matter at the DUNE near detector