Hidden On-Shell Mediators for the Galactic Center Gamma-Ray Excess

Abstract

We present simplified models for the galactic center gamma-ray excess where Dirac dark matter annihilates into pairs or triplets of on-shell bosonic mediators to the Standard Model. These annihilation modes allow the dark matter mass to be heavier than those of conventional effective theories for the gamma-ray excess. Because the annihilation rate is set by the dark matter--mediator coupling, the Standard Model coupling can be made parametrically small to `hide' the dark sector by suppressing direct detection and collider signals. We explore the viability of these models as a thermal relic and on the role of the mediators for controlling the gamma-ray spectral shape. We comment on ultraviolet completions for these simplified models and novel options for Standard Model final states.

arXiv comment21 pages + appendix + references, 11 figures, 3 tables. v2: minor revisions, additional figure and table for clarity, references added. v3: copyedit corrections, update references

References in corpus (171)

• A Universal Density Profile from Hierarchical Clustering
• A Large Mass Hierarchy from a Small Extra Dimension
• Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• The Structure of Cold Dark Matter Halos
• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• A Brief Introduction to PYTHIA 8.1
• MadGraph 5 : Going Beyond
• Observation of an anomalous positron abundance in the cosmic radiation
• Observational evidence for self-interacting cold dark matter
• Reheating after Inflation
• Planck 2013 results. I. Overview of products and scientific results
• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Likelihoods and Parameters from the WMAP data
• A Theory of Dark Matter
• First results from the LUX dark matter experiment at the Sanford Underground Research Facility
• Dark Matter Results from 225 Live Days of XENON100 Data
• Minimal Flavour Violation: an effective field theory approach
• Freeze-In Production of FIMP Dark Matter
• Dark Matter Annihilation in The Galactic Center As Seen by the Fermi Gamma Ray Space Telescope
• PPPC 4 DM ID: A Poor Particle Physicist Cookbook for Dark Matter Indirect Detection
• Dark matter direct detection rate in a generic model with micrOMEGAs2.2
• LCDM-based models for the Milky Way and M31 I: Dynamical Models
• Constraints on Dark Matter from Colliders
• The SIMP Miracle
• The Effective Field Theory of Dark Matter Direct Detection
• Astrophysical Signatures of Secluded Dark Matter
• Asymmetric Dark Matter: Theories, Signatures, and Constraints
• Two-component spinor techniques and Feynman rules for quantum field theory and supersymmetry
• On The Origin Of The Gamma Rays From The Galactic Center
• Beyond Collisionless Dark Matter: Particle Physics Dynamics for Dark Matter Halo Structure
• Detection of a Gamma-Ray Source in the Galactic Center Consistent with Extended Emission from Dark Matter Annihilation and Concentrated Astrophysical Emission
• Review of asymmetric dark matter
• Simplified Models for LHC New Physics Searches
• Superheavy dark matter
• Thermally Generated Gauge Singlet Scalars as Self-Interacting Dark Matter
• Universal Unitarity Triangle and Physics Beyond the Standard Model
• Missing Energy Signatures of Dark Matter at the LHC
• Hidden Charged Dark Matter
• Dark Matter and Pulsar Model Constraints from Galactic Center Fermi-LAT Gamma Ray Observations
• The Tevatron at the Frontier of Dark Matter Direct Detection
• Production of massive particles during reheating
• Superweakly Interacting Massive Particles
• Constraints on Light Majorana Dark Matter from Colliders
• Astrophysical and Dark Matter Interpretations of Extended Gamma-Ray Emission from the Galactic Center
• Cores in Dwarf Galaxies from Dark Matter with a Yukawa Potential
• Weak Corrections are Relevant for Dark Matter Indirect Detection
• Halo Shape and Relic Density Exclusions of Sommerfeld-Enhanced Dark Matter Explanations of Cosmic Ray Excesses
• SuperWIMP Dark Matter Signals from the Early Universe
• LEP Shines Light on Dark Matter
• Model-independent WIMP Scattering Responses and Event Rates: A Mathematica Package for Experimental Analysis
• Non-relativistic effective theory of dark matter direct detection
• Maverick dark matter at colliders
• Higgs-field Portal into Hidden Sectors
• Dark Matter Self-Interactions and Light Force Carriers
• The Cosmology of Atomic Dark Matter
• Limits on spin-dependent WIMP-nucleon cross sections from 225 live days of XENON100 data
• Double-Disk Dark Matter
• On the Validity of the Effective Field Theory for Dark Matter Searches at the LHC
• Tools for model-independent bounds in direct dark matter searches
• Simplified Dark Matter Models for the Galactic Center Gamma-Ray Excess
• On the effect of resonances in composite Higgs phenomenology
• LHC Bounds on Interactions of Dark Matter
• A Renormalizable Model for the Galactic Center Gamma Ray Excess from Dark Matter Annihilation
• Mirror matter-type dark matter
• DAMA/LIBRA and leptonically interacting Dark Matter
• Beyond Effective Field Theory for Dark Matter Searches at the LHC
• Possible Evidence For Dark Matter Annihilation In The Inner Milky Way From The Fermi Gamma Ray Space Telescope
• The Consistency of Fermi-LAT Observations of the Galactic Center with a Millisecond Pulsar Population in the Central Stellar Cluster
• Resonant Dark Forces and Small Scale Structure
• Quantum Field Theory and Unification in AdS5
• A comment on the emission from the Galactic Center as seen by the Fermi telescope
• Generalized Analysis of Weakly-Interacting Massive Particle Searches
• Leptogenesis as a Common Origin for Matter and Dark Matter
• Unitarity and Monojet Bounds on Models for DAMA, CoGeNT, and CRESST-II
• Semi-annihilation of Dark Matter
• SuperWIMP Gravitino Dark Matter from Slepton and Sneutrino Decays
• Deducing the nature of dark matter from direct and indirect detection experiments in the absence of collider signatures of new physics
• The Effective Lagrangian in the Randall-Sundrum Model and Electroweak Physics
• Pulsars Cannot Account for the Inner Galaxy's GeV Excess
• Extended gamma-ray emission from Coy Dark Matter
• Direct Detection Portals for Self-interacting Dark Matter
• Matrix element analyses of dark matter scattering and annihilation
• Fitting the Galactic Center Gamma-Ray Excess with Cascade Annihilations
• Dark matter constraints from box-shaped gamma-ray features
• Simplified Models for Dark Matter Interacting with Quarks
• On dark matter models with uniquely spin-dependent detection possibilities
• Light dark matter and $Z^{\prime }$ dark force at colliders
• Flavored Dark Matter and the Galactic Center Gamma-Ray Excess
• Higgs portal vector dark matter for $\mathrm{GeV}$ scale $\gamma$-ray excess from galactic center
• LHC and Tevatron bounds on the dark matter direct detection cross-section for vector mediators
• REALISTIC MODELS WITH A LIGHT U(1) GAUGE BOSON COUPLED TO BARYON NUMBER
• Gamma Ray Line Constraints on Effective Theories of Dark Matter
• Possible Light U(1) Gauge Boson Coupled to Baryon Number
• Global Constraints on Effective Dark Matter Interactions: Relic Density, Direct Detection, Indirect Detection, and Collider
• The Contribution of Cosmic Rays Interacting With Molecular Clouds to the Galactic Center Gamma-Ray Excess
• Probing dark matter couplings to top and bottom at the LHC
• Mono-Higgs: a new collider probe of dark matter
• Coupling--mass mapping of di-jet peak searches
• Dark matter with $t$-channel mediator: a simple step beyond contact interaction
• The Effective Hooperon
• Searches with Mono-Leptons
• New weakly-coupled forces hidden in low-energy QCD
• Dark Matter Signals from Cascade Annihilations
• Dark Atoms: Asymmetry and Direct Detection
• Collider searches for dark matter in events with a Z boson and missing energy
• A weighty interpretation of the Galactic Centre excess
• Hidden GeV-scale interactions of quarks
• Dark Forces and Light Dark Matter
• Mono-Higgs Detection of Dark Matter at the LHC
• Dark Matter from Minimal Flavor Violation
• Collider Constraints on Dipole-Interacting Dark Matter
• Antiprotons from Dark Matter: Current constraints and future sensitivities
• Galilean Equivalence for Galactic Dark Matter
• Mirror Matter as Self Interacting Dark Matter
• Searching for Dark Matter at the LHC with a Mono-Z
• The Galactic Center Excess from the Bottom Up
• Constraining the interaction strength between dark matter and visible matter: I. fermionic dark matter
• Effective WIMPs
• New Constraints (and Motivations) for Abelian Gauge Bosons in the MeV-TeV Mass Range
• Contact Interactions Probe Effective Dark Matter Models at the LHC
• Effective Dark Matter Model: Relic density, CDMS II, Fermi LAT and LHC
• Fitting the Fermi-LAT GeV excess: On the importance of including the propagation of electrons from dark matter
• Bounds on Dark Matter Interactions with Electroweak Gauge Bosons
• Next-to-Leading Order Predictions for Dark Matter Production at Hadron Colliders
• Low-mass right-handed sneutrino dark matter: SuperCDMS and LUX constraints and the Galactic Centre gamma-ray excess
• On the Effect of Nuclear Response Functions in Dark Matter Direct Detection
• Dark matter vs. Pulsars: Catching the impostor
• Probing Nonstandard Standard Model Backgrounds with LHC Monojets
• A Possible Explanation of Low Energy $\gamma$-ray Excess from Galactic Centre and Fermi Bubble by a Dark Matter Model with Two Real Scalars
• Two Lines or Not Two Lines? That is the Question of Gamma Ray Spectra
• Composite Higgs Sketch
• Gamma ray emission in Fermi bubbles and Higgs portal dark matter
• Direct and Indirect Singlet Scalar Dark Matter Detection in the Lepton-Specific two-Higgs-doublet Model
• Gravitino Warm Dark Matter with Entropy Production
• Three Exceptions for Thermal Dark Matter with Enhanced Annihilation to Gamma Gamma
• Accurate estimate of the relic density and the kinetic decoupling in non-thermal dark matter models
• The Effective Theory of Self-Interacting Dark Matter
• The dynamical formation of LMXBs in dense stellar environments: globular clusters and the inner bulge of M31
• Light Dark Matter Anomalies After LUX
• Supersymmetry, Nonthermal Dark Matter and Precision Cosmology
• On the effective operators for Dark Matter annihilations
• A Leptophobic Z' And Dark Matter From Grand Unification
• Phenomenology of Dirac Neutralino Dark Matter
• Spin 3/2 Particle as a Dark Matter Candidate: an Effective Field Theory Approach
• Sensitivity of CTA to dark matter signals from the Galactic Center
• Mono-everything: combined limits on dark matter production at colliders from multiple final states
• Model Independent Direct Detection Analyses
• On the status of superheavy dark matter
• Fermi Bubbles under Dark Matter Scrutiny. Part I: Astrophysical Analysis
• Bounds on dark matter interpretation of Fermi-LAT GeV excess
• Gamma-ray Constraints on Effective Interactions of the Dark Matter
• Cosmic Antiproton Constraints on Effective Interactions of the Dark Matter
• On the Correlation Between the Spin-Independent and Spin-Dependent Direct Detection of Dark Matter
• 10 GeV neutralino dark matter and light stau in the MSSM
• Dark matter annihilation through a lepton-specific Higgs boson
• Fermi Bubbles under Dark Matter Scrutiny Part II: Particle Physics Analysis
• Implications of mirror dark matter kinetic mixing for CMB anisotropies
• LHC Bounds on UV-Complete Models of Dark Matter
• W-WIMP Annihilation as a Source of the Fermi Bubbles
• Particle Physics Implications and Constraints on Dark Matter Interpretations of the CDMS Signal
• Coy Dark Matter and the anomalous magnetic moment
• Flavor-Nonuniversal Dark Gauge Bosons and the Muon g-2
• WIMPless dark matter and the excess gamma rays from the Galactic center
• The Galactic Center Region Gamma Ray Excess from A Supersymmetric Leptophilic Higgs Model
• A dark force for baryons
• Light dark matter for Fermi-LAT and CDMS observations
• Detecting interactions between dark matter and photons at high energy $e^{+}{e}^{-}$ colliders
• Self-interacting Dark Matter Benchmarks
• The Pitfalls of Dark Crossings
• Constraints on a Non-thermal History from Galactic Dark Matter Spikes
• Direct Detection with Dark Mediators
• Comment on the "Freeze-In" mechanism of dark matter production

Cited by in corpus (122)

• WIMP dark matter candidates and searches - current status and future prospects
• Simplified Models for Dark Matter Searches at the LHC
• A Tale of Tails: Dark Matter Interpretations of the Fermi GeV Excess in Light of Background Model Systematics
• A taste of dark matter: Flavour constraints on pseudoscalar mediators
• Scalar Simplified Models for Dark Matter
• (In)direct Detection of Boosted Dark Matter
• WIMPs at the Galactic Center
• Fitting the Galactic Center Gamma-Ray Excess with Cascade Annihilations
• 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
• The windows for kinetically mixed Z'-mediated dark matter and the galactic center gamma ray excess
• Galactic Center Gamma-Ray Excess from Dark Matter Annihilation: Is There A Black Hole Spike?
• Powerful Solar Signatures of Long-Lived Dark Mediators
• Pseudoscalar Portal Dark Matter
• NMSSM Interpretation of the Galactic Center Excess
• Looking for the WIMP Next Door
• Challenges in Explaining the Galactic Center Gamma-Ray Excess with Millisecond Pulsars
• Updated cosmic-ray and radio constraints on light dark matter: Implications for the GeV gamma-ray excess at the Galactic center
• Dark Matter Interpretation of the Fermi-LAT Observation Toward the Galactic Center
• Multi-Step Cascade Annihilations of Dark Matter and the Galactic Center Excess
• Pseudoscalar Mediators: A WIMP model at the Neutrino Floor
• Galactic center $\gamma$-ray excess in hidden sector DM models with dark gauge symmetries: local $Z_3$ symmetry as an example
• Radiative bound-state-formation cross-sections for dark matter interacting via a Yukawa potential
• Antiproton constraints on the GeV gamma-ray excess: a comprehensive analysis
• The Return of the Templates: Revisiting the Galactic Center Excess with Multi-Messenger Observations
• The High-Energy Tail of the Galactic Center Gamma-Ray Excess
• The Gamma-Ray Luminosity Function of Millisecond Pulsars and Implications for the GeV Excess
• Towards a realistic astrophysical interpretation of the gamma-ray Galactic center excess
• A description of the Galactic Center excess in the Minimal Supersymmetric Standard Model
• Two component WIMP-FImP dark matter model with singlet fermion, scalar and pseudo scalar
• 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
• The Gamma-Ray Pulsar Population of Globular Clusters: Implications for the GeV Excess
• Nonthermal Two Component Dark Matter Model for Fermi-LAT $\gamma$-ray excess and 3.55 keV X-ray Line
• Constraints on Spin-Dependent Dark Matter Scattering with Long-Lived Mediators from TeV Observations of the Sun with HAWC
• Towards a Supersymmetric Description of the Fermi Galactic Center Excess
• Recommendations of the LHC Dark Matter Working Group: Comparing LHC searches for heavy mediators of dark matter production in visible and invisible decay channels
• Secluded singlet fermionic dark matter driven by the Fermi gamma-ray excess
• Searching for Secluded Dark Matter with H.E.S.S., Fermi-LAT, and Planck
• Probing Leptophilic Dark Sectors with Hadronic Processes
• Low Mass X-Ray Binaries in the Inner Galaxy: Implications for Millisecond Pulsars and the GeV Excess
• Fits to the Fermi-LAT GeV excess with RH sneutrino dark matter: implications for direct and indirect dark matter searches and the LHC
• Model-independent analysis of the DAMPE excess
• Millisecond Pulsars, TeV Halos, and Implications For The Galactic Center Gamma-Ray Excess
• Improved Cosmic-Ray Injection Models and the Galactic Center Gamma-Ray Excess
• Annihilation Signatures of Hidden Sector Dark Matter Within Early-Forming Microhalos
• Annihilating Asymmetric Dark Matter
• Galactic Centre GeV Photons from Dark Technicolor
• Multimediator models for the galactic center gamma ray excess
• Breaking a dark degeneracy: The gamma-ray signature of early matter domination
• $Z^{\prime }$ Mediated WIMPs: Dead, Dying, or Soon to be Detected?
• Dark Forces in the Sky: Signals from Z' and the Dark Higgs
• Self-interacting dark matter without prejudice
• Galactic Center gamma-ray excess from two-Higgs-doublet-portal dark matter
• Constraining Dark Matter Interactions with Pseudoscalar and Scalar Mediators Using Collider Searches for Multi-jets plus Missing Transverse Energy
• Les Houches Lectures on Indirect Detection of Dark Matter
• The $\text{Fermi}$-LAT gamma-ray excess at the Galactic Center in the singlet-doublet fermion dark matter model
• NMSSM explanations of the Galactic center gamma ray excess and promising LHC searches
• Vector Fermion-Portal Dark Matter: Direct Detection and Galactic Center Gamma-Ray Excess
• Search for right-handed neutrinos from dark matter annihilation with gamma-rays
• Evidence of TeV Halos Around Millisecond Pulsars
• Galactic Center Gamma-Ray Excess through a Dark Shower
• Confronting Galactic and Extragalactic $\gamma$-ray observed by Fermi-LAT with Annihilating Dark Matter in Inert Higgs Doublet Model
• $SU(2{)}_X$ Vector DM and Galactic Center Gamma-Ray Excess
• A Simplified Model for Dark Matter Interacting Primarily with Gluons
• Enhancing Dark Matter Annihilation Rates with Dark Bremsstrahlung
• Simplified Dark Matter Models Confront the Gamma Ray Excess
• TeV dark matter and the DAMPE electron excess
• Simplified Models for Displaced Dark Matter Signatures
• Confronting the Galactic Center Gamma Ray Excess With a Light Scalar Dark Matter
• WIMPflation
• On-shell mediator dark matter models and the Xenon1T anomaly
• Galactic Gamma Ray Excess and Dark Matter Phenomenology in a $U(1{)}_{B-L}$ Model
• Invisible Higgs Decays to Hooperons in the NMSSM
• p-wave Annihilating Dark Matter from a Decaying Predecessor and the Galactic Center Excess
• Radiative Neutrino Mass with $Z_3$ Dark matter: From Relic Density to LHC Signatures
• Point Sources from Dissipative Dark Matter
• Boxes, Boosts, and Energy Duality: Understanding the Galactic-Center Gamma-Ray Excess through Dynamical Dark Matter
• A Systematic Study of Hidden Sector Dark Matter: Application to the Gamma-Ray and Antiproton Excesses
• Galactic Center Gamma Ray Excess in a Radiative Neutrino Mass Model
• Confronting Galactic center and dwarf spheroidal gamma-ray observations with cascade annihilation models
• MSSM A-funnel and the Galactic Center Excess: Prospects for the LHC and Direct Detection Experiments
• Dark Matter Microhalos in the Solar Neighborhood: Pulsar Timing Signatures of Early Matter Domination
• Saving the MSSM from the Galactic Center Excess
• Known Radio Pulsars Do Not Contribute to the Galactic Center Gamma-Ray Excess
• Dark Higgs Channel for FERMI GeV $\gamma$-ray Excess
• Updated Collider and Direct Detection Constraints on Dark Matter Models for the Galactic Center Gamma-Ray Excess
• Lepton-Flavor Violating Mediators
• Wavelet-Based Techniques for the Gamma-Ray Sky
• Determining the Quantum Numbers of Simplified Models in $t\bar{t}X$ production at the LHC
• Dark Matter, Shared Asymmetries, and Galactic Gamma Ray Signals
• Tau Portal Dark Matter models at the LHC
• Fermionic Dark Matter through a Light Pseudoscalar Portal: Hints from the DAMA Results
• Enhanced neutrino emissivities in pseudoscalar-mediated Dark Matter annihilation in Neutron Stars
• Dark Matter Freeze Out during an Early Cosmological Period of QCD Confinement
• The Effects Of Relativistic Hidden Sector Particles on the Matter Power Spectrum
• Two-mediator dark matter models and cosmic electron excess
• Thermodynamic Evolution of Secluded Vector Dark Matter: Conventional WIMPs and Nonconventional WIMPs
• Explaining Low Energy $\gamma$-ray Excess from the Galactic Centre using a Two Component Dark Matter Model
• Explanation of the 511 keV line: Cascade annihilating dark matter with the ${}^8$Be anomaly
• Interpreting the galactic center gamma-ray excess in the NMSSM
• The Galactic Center Excess from Z3 Scalar Semi-Annihilations
• Interpreting the Fermi-LAT gamma ray excess in the simplified framework
• (In)Direct Detection of Boosted Dark Matter
• Possible explanation of indirect gamma ray signatures from hidden sector fermionic dark matter
• Study of WIMP annihilations into a pair of on-shell scalar mediators
• On Dark Matter Explanations of the Gamma-Ray Excesses from the Galactic Center and M31
• Everything You Always Wanted to Know About Dark Matter Elastic Scattering Through Higgs Loops But Were Afraid to Ask
• Indirect Detection Imprint of a CP Violating Dark Sector
• Phenomenology of Colored Radiative Neutrino Mass Model and Its Implications on the Cosmic-ray Observations
• Quantum Simulations of Dark Sector Showers
• Search for Scalar Dark Matter via Pseudoscalar Portal Interactions: In Light of the Galactic Center Gamma-Ray Excess
• Interpretations of galactic center gamma-ray excess confronting the PandaX-II constraints on dark matter-neutron spin-dependent scatterings in the NMSSM
• Dwarf Galaxy $\gamma$-excess and 3.55 keV X-ray Line In A Nonthermal Dark Matter Model
• The Cherenkov Telescope Array Will Test Whether Pulsars Generate the Galactic Center Gamma-Ray Excess
• Low Energy Gamma Ray Excess Confronting a Singlet Scalar Extended Inert Doublet Dark Matter Model
• A Potentially Detectable Gamma-Ray Line in the Fermi Galactic Center Excess -- In Light of One-Step Cascade Annihilations of Secluded (Vector) Dark Matter via the Higgs Portal
• Limits on Early Matter Domination from the Isotropic Gamma-Ray Background
• Dark matter properties implied by gamma ray interstellar emission models
• Extended Higgs-portal dark matter and the Fermi-LAT Galactic Center Excess
• Boosting (In)direct Detection of Dark Matter