Extending the Discovery Potential for Inelastic-Dipole Dark Matter with FASER

Abstract

Neutral particles are notoriously difficult to observe through electromagnetic interactions. As a result, they naturally elude detection in most collider detectors. In this paper, we point out that neutral particles that interact through a dipole interaction can nevertheless be detected in far-forward detectors designed to search for long-lived particles (LLPs). In contrast to previous analyses that focused on neutral particles with elastic interactions, we consider inelastic interactions. This naturally leads to LLPs, and we demonstrate that FASER (and future experiments at the Forward Physics Facility) will be able to probe substantial regions of the associated parameter space. In particular, we find that FASER is capable of probing the region of parameter space wherein thermal freeze-out gives rise to an $\mathcal{O}$(GeV) dark-matter candidate with the appropriate relic abundance, as well as regions of parameter space that are difficult to probe at fixed-target experiments. FASER and its successor experiments may therefore play a critical role in the discovery of such a dark-matter candidate.

24 pages, LaTeX, 5 figures, 1 table

References in corpus (20)

• PYTHIA 6.4 Physics and Manual
• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• An Introduction to PYTHIA 8.2
• New Fixed-Target Experiments to Search for Dark Gauge Forces
• New Limits on Hidden Photons from Past Electron Beam Dumps
• Constraints on sub-GeV hidden sector gauge bosons from a search for heavy neutrino decays
• The Forward Physics Facility: Sites, Experiments, and Physics Potential
• Refined Bounds on MeV-scale Thermal Dark Sectors from BBN and the CMB
• Magnetic Inelastic Dark Matter
• Light dark matter in neutrino beams: production modelling and scattering signatures at MiniBooNE, T2K and SHiP
• Dipolar Dark Matter
• FORESEE: FORward Experiment SEnsitivity Estimator for the LHC and future hadron colliders
• A New Direction in Dark-Matter Complementarity: Dark-Matter Decay as a Complementary Probe of Multi-Component Dark Sectors
• Neutrino beam-dump experiment with FASER at the LHC
• Probing right-handed neutrinos dipole operators
• FLArE up dark sectors with EM form factors at the LHC Forward Physics Facility
• ALP Searches at the LHC: FASER as a Light Shining through Walls Experiment
• Off-Diagonal Dark-Matter Phenomenology: Exploring Enhanced Complementarity Relations in Non-Minimal Dark Sectors
• Searching for a Single Photon from Lightest Neutralino Decays in R-parity-violating Supersymmetry at FASER
• Neutrino Detection without Neutrino Detectors: Discovering Collider Neutrinos at FASER with Electronic Signals Only

Cited by in corpus (8)

• Science and Project Planning for the Forward Physics Facility in Preparation for the 2024-2026 European Particle Physics Strategy Update
• Illuminating the dark: mono-$\gamma$ signals at NA62
• Unlocking the Inelastic Dark Matter Window with Vector Mediators
• Looking forward to inelastic DM with electromagnetic form factors at FASER and beam dump experiments
• The LHC as a TeV Muon Beam Dump: Muonphilic Scalars at FASER
• Two portals to GeV sterile neutrinos : dipole versus mixing
• Letter of Intent: The Forward Physics Facility
• Earth-Catalyzed Detection of Magnetic Inelastic Dark Matter with Photons in Large Underground Detectors