Towards a Supersymmetric Description of the Fermi Galactic Center Excess

Abstract

We attempt to build a model that describes the {\it Fermi} galactic gamma-ray excess (FGCE) within a UV-complete Supersymmetric framework; we find this to be highly non-trivial. At the very least a successful Supersymmetric explanation must have several important ingredients in order to fit the data and satisfy other theoretical and experimental constraints. Under the assumption that a {\it single} annihilation mediator is responsible for both the observed relic density as well as the FGCE, we show that the requirements are not easily satisfied in many TeV-scale SUSY models, but can be met with some model building effort in the general NMSSM with $\sim 10$ parameters beyond the MSSM. We find that the data selects a particular region of the parameter space with a mostly singlino lightest Supersymmetric particle and a relatively light CP-odd Higgs boson that acts as the mediator for dark matter annihilation. We study the predictions for various observables within this parameter space, and find that searches for this light CP-odd state at the LHC, as well as searches for the direct detection of dark matter, are likely to be quite challenging. It is possible that a signature could be observed in the flavor sector; however, indirect detection remains the best probe of this scenario.

43 pages, 16 figures

References in corpus (41)

• Observation of an anomalous positron abundance in the cosmic radiation
• micrOMEGAs2.0: a program to calculate the relic density of dark matter in a generic model
• A Tentative Gamma-Ray Line from Dark Matter Annihilation at the Fermi Large Area Telescope
• Search for high-mass dilepton resonances in pp collisions at sqrt(s) = 8 TeV with the ATLAS detector
• Indirect search for dark matter with micrOMEGAs2.4
• First dark matter search results from a 4-kg CF${}_3$I bubble chamber operated in a deep underground site
• Search for TeV Gamma-ray Emission from GRB 100621A, an extremely bright GRB in X-rays, with H.E.S.S
• Simplified Dark Matter Models for the Galactic Center Gamma-Ray Excess
• Constraints on the Galactic Halo Dark Matter from Fermi-LAT Diffuse Measurements
• A Renormalizable Model for the Galactic Center Gamma Ray Excess from Dark Matter Annihilation
• Possible Evidence For Dark Matter Annihilation In The Inner Milky Way From The Fermi Gamma Ray Space Telescope
• Flavor in Supersymmetry with an Extended R-symmetry
• NMSPEC: A Fortran code for the sparticle and Higgs masses in the NMSSM with GUT scale boundary conditions
• Discrete R symmetries for the MSSM and its singlet extensions
• Search for neutral Higgs bosons of the minimal supersymmetric standard model in pp collisions at $\sqrt{s}$ = 8 TeV with the ATLAS detector
• Hidden On-Shell Mediators for the Galactic Center Gamma-Ray Excess
• Fitting the Galactic Center Gamma-Ray Excess with Cascade Annihilations
• Higgs portal vector dark matter for $\mathrm{GeV}$ scale $\gamma$-ray excess from galactic center
• The windows for kinetically mixed Z'-mediated dark matter and the galactic center gamma ray excess
• Fermi 130 GeV gamma-ray excess and dark matter annihilation in sub-haloes and in the Galactic centre
• Not so Coy Dark Matter explains DAMA (and the Galactic Center excess)
• The Effective Hooperon
• A weighty interpretation of the Galactic Centre excess
• Hidden Sector Dark Matter Models for the Galactic Center Gamma-Ray Excess
• NMSSM Interpretation of the Galactic Center Excess
• The Galactic Center Excess from the Bottom Up
• Light Neutralino Dark Matter: Direct/Indirect Detection and Collider Searches
• Strong Evidence for Gamma-ray Line Emission from the Inner Galaxy
• Galactic center $\gamma$-ray excess in hidden sector DM models with dark gauge symmetries: local $Z_3$ symmetry as an example
• A simplified 2HDM with a scalar dark matter and the galactic center gamma-ray excess
• Indirect detection of light neutralino dark matter in the NMSSM
• Supersymmetric Sub-Electroweak Scale Dark Matter, the Galactic Center Gamma-ray Excess, and Exotic Decays of the 125 GeV Higgs Boson
• Viable Gravity-Mediated Supersymmetry Breaking
• Class of Higgs-portal Dark Matter models in the light of gamma-ray excess from Galactic center
• Lessons and Prospects from the pMSSM after LHC Run I: Neutralino LSP
• Phenomenology of the General NMSSM with Gauge Mediated Supersymmetry Breaking
• Annihilating Asymmetric Dark Matter
• Bounds on dark matter interpretation of Fermi-LAT GeV excess
• Galactic Center gamma-ray excess from two-Higgs-doublet-portal dark matter
• Higgs Coupling Measurements and Direct Searches as Complementary Probes of the pMSSM
• Low Energy Gamma Ray Excess Confronting a Singlet Scalar Extended Inert Doublet Dark Matter Model

Cited by in corpus (11)

• 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
• WIMPs at the Galactic Center
• The Gamma-Ray Pulsar Population of Globular Clusters: Implications for the GeV Excess
• SUSY Implications from WIMP Annihilation into Scalars at the Galactic Centre
• Present Status and Future Tests of the Higgsino-Singlino Sector in the NMSSM
• NMSSM explanations of the Galactic center gamma ray excess and promising LHC searches
• The interpretation for Galactic Center Excess and Electroweak Phase Transition in the NMSSM
• Extending LHC Coverage to Light Pseudoscalar Mediators and Coy Dark Sectors
• Higgs mass from neutrino-messenger mixing
• Implications of the Fermi-LAT Pass 8 Galactic Center Excess on Supersymmetric Dark Matter