Illuminating the dark: mono-$\gamma$ signals at NA62

Abstract

Dipole interactions between dark sector states or between a Standard Model particle and a dark state can efficiently be searched for via high-intensity fixed-target facilities. We propose to look for the associated mono-$\gamma$ signature at the NA62 experiment running in beam dump mode. Focusing on models of dipole inelastic Dark Matter and active-sterile neutrino dipole interactions, we compute the corresponding expected sensitivities finding promising prospects for discovery already with $\sim 10^{17}$ proton-on-target, corresponding to the present accumulated dataset.

v2: matches published version v1: 18 pages, 4 figures, 1 table

References in corpus (21)

• FLAG Review 2021
• Heavy Majorana Neutrinos in the Effective Lagrangian Description: Application to Hadron Colliders
• Refined Bounds on MeV-scale Thermal Dark Sectors from BBN and the CMB
• Magnetic Inelastic Dark Matter
• Right-handed neutrino magnetic moments
• Double Bangs from New Physics in IceCube
• Heavy Flavour Hadro-Production from Fixed-Target to Collider Energies
• Dipolar Dark Matter
• Broadening the Higgs Boson with Right-Handed Neutrinos and a Higher Dimension Operator at the Electroweak Scale
• Masses and decay constants of the $\eta$ and ${\eta }^{\prime }$ mesons from lattice QCD
• Sensitivities to feebly interacting particles: public and unified calculations
• Long-lived Sterile Neutrinos at Belle II in Effective Field Theory
• The see-saw portal at future Higgs Factories
• Probing right-handed neutrinos dipole operators
• Assessment of the Dimension-5 Seesaw Portal and Impact of Exotic Higgs Decays on Non-Pointing Photon Searches
• Long-lived heavy neutral leptons from mesons in effective field theory
• Neutrino Portals, Terrestrial Upscattering, and Atmospheric Neutrinos
• Reinterpretation of searches for long-lived particles from meson decays
• Long-lived neutral fermions at the DUNE near detector
• Dipole portal and neutrinophilic scalars at DUNE revisited: the importance of the high-energy neutrino tail
• Extending the Discovery Potential for Inelastic-Dipole Dark Matter with FASER

Cited by in corpus (5)

• Unlocking the Inelastic Dark Matter Window with Vector Mediators
• Probing displaced (dark)photons from low reheating freeze-in at the LHC
• Two portals to GeV sterile neutrinos : dipole versus mixing
• Electromagnetic Leptogenesis -- an EFT-Consistent Analysis via Wilson Coefficients. Part I. Low-Scale, Non-Resonant Regime
• Study of sub-GeV Dipolar Dark States at SND@LHC within Invisible Bounds on Meson Decays