The windows for kinetically mixed Z'-mediated dark matter and the galactic center gamma ray excess

Abstract

One of the simplest hidden sectors with signatures in the visible sector is fermionic dark matter $\chi$ coupled to a $Z^{\prime }$ gauge boson that has purely kinetic mixing with the standard model hypercharge. We consider the combined constraints from relic density, direct detection and collider experiments on such models in which the dark matter is either a Dirac or a Majorana fermion. We point out sensitivity to details of the UV completion for the Majorana model. For kinetic mixing parameter $\epsilon \le 0.01$, only relic density and direct detection are relevant, while for larger $\epsilon$, electroweak precision, LHC dilepton, and missing energy constraints become important. We identify regions of the parameter space of $m_{\chi }$, $m_{Z^{\prime }}$, dark gauge coupling and $\epsilon$ that are most promising for discovery through these experimental probes. We study the compatibility of the models with the galactic center gamma ray excess, finding agreement at the 2-3$\sigma$ level for the Dirac model.

arXiv comment13 pages, 10 figures; v.2 added reference; v.3 minor clarifications, published version

References in corpus (24)

• A Theory of Dark Matter
• Secluded WIMP Dark Matter
• Echoes of a Hidden Valley at Hadron Colliders
• Precise Relic WIMP Abundance and its Impact on Searches for Dark Matter Annihilation
• Update on scalar singlet dark matter
• Astrophysical and Dark Matter Interpretations of Extended Gamma-Ray Emission from the Galactic Center
• Search for dark matter annihilations in the Sun with the 79-string IceCube detector
• Finding an Upper Limit in the Presence of Unknown Background
• A Stueckelberg Extension of the Standard Model
• The Dark Z' Portal: Direct, Indirect and Collider Searches
• Hidden On-Shell Mediators for the Galactic Center Gamma-Ray Excess
• Fitting the Galactic Center Gamma-Ray Excess with Cascade Annihilations
• Spin-dependent WIMP scattering off nuclei
• (In)visible Z' and dark matter
• Invisible Z' and dark matter: LHC vs LUX constraints
• Hidden Sector Dark Matter Models for the Galactic Center Gamma-Ray Excess
• Axial Dark Matter: the case for an invisible Z'
• The Galactic Center Excess from the Bottom Up
• Possible Effects of a Hidden Valley on Supersymmetric Phenomenology
• Electroweak and Dark Matter Constraints on a Z' in Models with a Hidden Valley
• Search for neutrino emission from relic dark matter in the Sun with the Baikal NT200 detector
• Reanalysis of nuclear spin matrix elements for dark matter spin-dependent scattering
• Sensitivity of future collider facilities to WIMP pair production via effective operators and light mediators
• Hidden Dipole Dark Matter

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• Explaining Dark Matter and $B$ Decay Anomalies with an $L_{\mu }-L_{\tau }$ Model
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• SIMP Spectroscopy
• Gamma-ray Constraints on Decaying Dark Matter and Implications for IceCube
• WIMPs at the Galactic Center
• Model-Independent Indirect Detection Constraints on Hidden Sector Dark Matter
• Dark Matter's secret liaisons: phenomenology of a dark U(1) sector with bound states
• Dark Matter Complementarity and the Z${}^{\prime }$ Portal
• Neutrino-Electron Scattering: General Constraints on Z' and Dark Photon Models
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• Challenges in Explaining the Galactic Center Gamma-Ray Excess with Millisecond Pulsars
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• Updated cosmic-ray and radio constraints on light dark matter: Implications for the GeV gamma-ray excess at the Galactic center
• Z-portal dark matter
• Galactic center $\gamma$-ray excess in hidden sector DM models with dark gauge symmetries: local $Z_3$ symmetry as an example
• Searches for dark photons at accelerators
• The High-Energy Tail of the Galactic Center Gamma-Ray Excess
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• Z' Mediated Dark Matter Models for the Galactic Center Gamma-Ray Excess
• Search for Gamma-ray Emission from Dark Matter Annihilation in the Large Magellanic Cloud with the Fermi Large Area Telescope
• Supersymmetric Sub-Electroweak Scale Dark Matter, the Galactic Center Gamma-ray Excess, and Exotic Decays of the 125 GeV Higgs Boson
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• A Tale of Two Portals: Testing Light, Hidden New Physics at Future $e^{+}{e}^{-}$ Colliders
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• A reappraisal of constraints on $Z^{\prime }$ models from unitarity and direct searches at the LHC
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• A Systematic Study of Hidden Sector Dark Matter: Application to the Gamma-Ray and Antiproton Excesses
• Uncovering light scalars with exotic Higgs decays to bbmumu
• Search for Higgs bosons decaying into new spin-0 or spin-1 particles in four-lepton final states with the ATLAS detector with 139 fb${}^{-1}$ of $pp$ collision data at $\sqrt{s}=13$ TeV
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• Explaining Low Energy $\gamma$-ray Excess from the Galactic Centre using a Two Component Dark Matter Model
• Unitarity Constraints and Collider Searches for Dark Photons
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• Higgs Boson Decays to Dark Photons through the Vectorized Lepton Portal
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• Phenomenology of Colored Radiative Neutrino Mass Model and Its Implications on the Cosmic-ray Observations
• Quantum Simulations of Dark Sector Showers
• Interpretations of galactic center gamma-ray excess confronting the PandaX-II constraints on dark matter-neutron spin-dependent scatterings in the NMSSM
• When Freeze-out occurs due to a non-Boltzmann suppression: A study of degenerate dark sector
• Dark matter properties implied by gamma ray interstellar emission models