Simplified Dark Matter Models with Charged Mediators: Prospects for Direct Detection

Abstract

We consider direct detection prospects for a class of simplified models of fermionic dark matter (DM) coupled to left and right-handed Standard Model fermions via two charged scalar mediators with arbitrary mixing angle $\alpha$. DM interactions with the nucleus are mediated by higher electromagnetic moments, which, for Majorana DM, is the anapole moment. After giving a full analytic calculation of the anapole moment, including its $\alpha$ dependence, and matching with limits in the literature, we compute the DM-nucleon scattering cross-section and show the LUX and future LZ constraints on the parameter space of these models. We then compare these results with constraints coming from $Fermi$-LAT continuum and line searches. Results in the supersymmetric limit of these simplified models are provided in all cases. We find that future direct detection experiments will be able to probe most of the parameter space of these models for $\mathcal{O}(100-200)$ GeV DM and lightest mediator mass $\lesssim \mathcal{O}(5\%)$ larger than the DM mass. The direct detection prospects dwindle for larger DM mass and larger mass gap between the DM and the lightest mediator mass, although appreciable regions are still probed for $\mathcal{O}(200)$ GeV DM and lightest mediator mass $\lesssim \mathcal{O}(20\%)$ larger than the DM mass. The direct detection bounds are also attenuated near certain "blind spots" in the parameter space, where the anapole moment is severely suppressed due to cancellation of different terms. We carefully study these blind spots and the associated $Fermi$-LAT signals in these regions.

arXiv comment30 pages, 10 captioned figures; v2: 32 pages, 10 captioned figures, revised and published version

References in corpus (58)

• An Introduction to PYTHIA 8.2
• Final Report of the Muon E821 Anomalous Magnetic Moment Measurement at BNL
• Automatized One-Loop Calculations in 4 and D dimensions
• First results from the LUX dark matter experiment at the Sanford Underground Research Facility
• Dark Matter Results from 225 Live Days of XENON100 Data
• New Measurement of the Electron Magnetic Moment and the Fine Structure Constant
• Searching for Dark Matter Annihilation from Milky Way Dwarf Spheroidal Galaxies with Six Years of Fermi-LAT Data
• Order of Magnitude Smaller Limit on the Electric Dipole Moment of the Electron
• The Tevatron at the Frontier of Dark Matter Direct Detection
• Improved Limits on Scattering of Weakly Interacting Massive Particles from Reanalysis of 2013 LUX data
• An Improved Limit on the Muon Electric Dipole Moment
• Search for direct production of charginos, neutralinos and sleptons in final states with two leptons and missing transverse momentum in pp collisions at sqrt(s) = 8 TeV with the ATLAS detector
• Updated Search for Spectral Lines from Galactic Dark Matter Interactions with Pass 8 Data from the Fermi Large Area Telescope
• Fermi LAT Search for Internal Bremsstrahlung Signatures from Dark Matter Annihilation
• Exclusion of canonical WIMPs by the joint analysis of Milky Way dwarfs with Fermi
• Searches for supersymmetric particles in e+e- collisions up to 208 GeV and interpretation of the results within the MSSM
• Searches for electroweak production of charginos, neutralinos, and sleptons decaying to leptons and W, Z, and Higgs bosons in pp collisions at 8 TeV
• New limits on dark matter annihilation from AMS cosmic ray positron data
• New Gamma-Ray Contributions to Supersymmetric Dark Matter Annihilation
• One-loop calculations in quantum field theory: from Feynman diagrams to unitarity cuts
• Scalar Simplified Models for Dark Matter
• Cosmological Moduli and the Post-Inflationary Universe: A Critical Review
• Fermion Portal Dark Matter
• Search for Anomalous Production of Di-lepton Events with Missing Transverse Momentum in e+e- Collisions at sqrt(s) = 183-209 GeV
• Constraining Dark Sectors at Colliders: Beyond the Effective Theory Approach
• Simplified Models for Dark Matter Interacting with Quarks
• Search for the Electric Dipole Moment of the tau Lepton
• Search for Scalar Leptons and Scalar Quarks at LEP
• Dark matter with $t$-channel mediator: a simple step beyond contact interaction
• Loopy Constraints on Leptophilic Dark Matter and Internal Bremsstrahlung
• Signatures of Majorana dark matter with t-channel mediators
• Monojet versus rest of the world I: t-channel Models
• Leptophilic Effective WIMPs
• Majorana Dark Matter with a Coloured Mediator: Collider vs Direct and Indirect Searches
• Probing Dark Matter at the LHC using Vector Boson Fusion Processes
• Dark Matter Search Results from the Commissioning Run of PandaX-II
• Direct detection of Light Anapole and Magnetic Dipole DM
• Discovering hidden sectors with mono-photon Z' searches
• Non-thermal Dark Matter in String Compactifications
• Vector Boson Fusion Processes as a Probe of Supersymmetric Electroweak Sectors at the LHC
• Mirage in the Sky: Non-thermal Dark Matter, Gravitino Problem, and Cosmic Ray Anomalies
• Sterile Neutrinos and Light Dark Matter Save Each Other
• Absolute Lower Limits on the Masses of Selectrons and Sneutrinos in the MSSM
• Light Dark Matter Anomalies After LUX
• Electric and anomalous magnetic dipole moments of the muon in the MSSM
• Probing Compressed Sleptons at the LHC using Vector Boson Fusion Processes
• Perspective of monochromatic gamma-ray line detection with the High Energy cosmic-Radiation Detection (HERD) facility onboard China's Space Station
• Anapole Dark Matter at the LHC
• Naturally Large Radiative Lepton Flavor Violating Higgs Decay Mediated by Lepton-flavored Dark Matter
• Constraining the Strength and CP Structure of Dark Production at the LHC: the Associated Top-Pair Channel
• A Simplified Model for Dark Matter Interacting Primarily with Gluons
• MSSM dark matter and a light slepton sector: The Incredible Bulk
• Searches for Dark Matter at the LHC: A Multivariate Analysis in the Mono-$Z$ Channel
• Gamma-ray Signals from Dark Matter Annihilation Via Charged Mediators
• Dipole Moment Bounds on Dark Matter Annihilation
• Charged mediators in dark matter scattering with nuclei and the strangeness content of nucleons: Strange Brew
• Anapole moment of the lightest neutralino in the cMSSM
• GAMMA-400 gamma-ray observatory

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• The Waning of the WIMP: Endgame?
• Dark matter direct detection of a fermionic singlet at one loop
• Dark sector-photon interactions in proton-beam experiments
• Stellar probes of dark sector-photon interactions
• FLArE up dark sectors with EM form factors at the LHC Forward Physics Facility
• Anapole Dark Matter via Vector Boson Fusion Processes at the LHC
• Collider Detection of Dark Matter Electromagnetic Anapole Moments
• Direct detection of vector dark matter through electromagnetic multipoles
• Black Holes, Dark Matter Spikes, and Constraints on Simplified Models with $t$-Channel Mediators
• Terrestrial Probes of Electromagnetically Interacting Dark Radiation
• $Z_3$ Scalar Dark Matter with Strong Positron Fluxes
• Multipole vector dark matter below the GeV-scale
• Anapole Moment of Majorana Fermions and Implications for Direct Detection of Neutralino Dark Matter
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