Combined constraints on dark photons and discovery prospects at the LHC and the Forward Physics Facility

Abstract

Hidden sectors are ubiquitous in supergravity theories, in strings and in branes. Well motivated models such as the Stueckelberg hidden sector model could provide a candidate for dark matter. In such models, the hidden sector communicates with the visible sector via the exchange of a dark photon (dark $Z^{\prime }$) while dark matter is constituted of Dirac fermions in the hidden sector. Using data from collider searches and precision measurements of SM processes as well as the most recent limits from dark matter direct and indirect detection experiments, we perform a comprehensive scan over a wide range of the $Z^{\prime }$ mass and set exclusion bounds on the parameter space from sub-GeV to several TeV. We then discuss the discovery potential of an $\mathcal{O}$(TeV) scale $Z^{\prime }$ at HL-LHC and the ability of future forward detectors to probe very weakly interacting sub-GeV $Z^{\prime }$ bosons. Our analysis shows that the parameter space in which a $Z^{\prime }$ can decay to hidden sector dark matter is severely constrained whereas limits become much weaker for a $Z^{\prime }$ with no dark decays. The analysis also favors a self-thermalized dark sector which is necessary to satisfy the dark matter relic density.

35 pages, 15 figures. Accepted for publication in JHEP

References in corpus (33)

• 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
• Dark Matter Results From 54-Ton-Day Exposure of PandaX-II Experiment
• micrOMEGAs4.1: two dark matter candidates
• The Dark Photon
• Robust Independent Validation of Experiment and Theory: Rivet version 3
• New Limits on Hidden Photons from Past Electron Beam Dumps
• Search for $A^{\prime }\to {\mu }^{+}{\mu }^{-}$ decays
• Evidence Of Dark Matter Annihilations In The WMAP Haze
• The Forward Physics Facility: Sites, Experiments, and Physics Potential
• Extra-weakly Interacting Dark Matter
• The High-Energy Frontier of the Intensity Frontier: Closing the Dark Photon, Inelastic Dark Matter, and Muon g-2 Windows
• Recasting direct detection limits within micrOMEGAs and implication for non-standard Dark Matter scenarios
• FORESEE: FORward Experiment SEnsitivity Estimator for the LHC and future hadron colliders
• Precision predictions for Z'-production at the CERN LHC: QCD matrix elements, parton showers, and joint resummation
• Testing new physics models with global comparisons to collider measurements: the Contur toolkit
• New sensitivity of current LHC measurements to vector-like quarks
• NLO+NLL limits on W' and Z' gauge boson masses in general extensions of the Standard Model
• A cosmologically consistent millicharged dark matter solution to the EDGES anomaly of possible string theory origin
• Chiral $Z^{\prime }$ in FASER, FASER2, DUNE, and ILC beam dump experiments
• Self-interacting hidden sector dark matter, small scale galaxy structure anomalies, and a dark force
• Probing the minimal $U(1{)}_X$ model at future electron-positron colliders via the fermion pair-production channel
• CDF W mass anomaly from a dark sector with a Stueckelberg-Higgs portal
• Axial vectors in DarkCast
• A study of collider signatures for two Higgs doublet models with a Pseudoscalar mediator to Dark Matter
• A multi-temperature universe can allow a sub-MeV dark photon dark matter
• Impact of dark matter self-scattering on its relic abundance
• Non-standard Neutrino and $Z^{\prime }$ Interactions at the FASER$\nu$ and the LHC
• A tower of hidden sectors: a general treatment and physics implications
• A long-lived stop with freeze-in and freeze-out dark matter in the hidden sector
• Interference effects in dilepton resonance searches for Z' bosons and dark matter mediators
• A decaying neutralino as dark matter and its gamma ray spectrum
• Sensitivities on dark photon from the Forward Physics Experiments

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• Searching for new physics effects in future $W$ mass and ${\sin }^2{\theta }_W(Q^2)$ determinations
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• Gauge-independent Gravitational Waves from Cogenesis in a $B-L$ Conserving Universe
• Probing a $Z^{\prime }$ gauge boson via neutrino trident scattering in the Forward Physics Facility at the LHC and FCC
• Systematic analysis of search strategies for $L_{\mu }-L_{\tau }$ gauge bosons at Belle II