Hunting for Heavy Winos in the Galactic Center

Abstract

Observing gamma rays using ground-based atmospheric Cherenkov telescopes provides one of the only probes of heavy weakly interacting dark matter. A canonical target is the thermal wino, for which the strongest limits come from searches for photon lines from annihilations in the Galactic Center. Irreducible finite energy resolution effects motivate refining the prediction for a wino signal beyond the photon line approximation; recently, modern effective field theory techniques have been utilized to obtain a precise calculation of the full photon energy spectrum from wino annihilation. In this paper, we investigate the implications for a realistic mock H.E.S.S.-like line search. We emphasize the impact of including the non-trivial spectral shape, and we carefully treat the region of interest, presenting results for choices between $1^{\circ }$ and $4^{\circ }$ from the Galactic Center. Projected limits for wino masses from $1$-$70$ TeV are interpreted as a constraint on the wino annihilation rate, or alternatively as the minimum core size required such that the wino is not excluded. If there is a thermal wino, H.E.S.S. will be able to probe cores of several kpc, which would begin to cause tension between this dark matter candidate and astrophysical observations/simulations.

arXiv comment18 pages, 14 figures

References in corpus (77)

• The Structure of Cold Dark Matter Halos
• A Theory of Dark Matter
• An effective field theory for collinear and soft gluons: heavy to light decays
• Out Of This World Supersymmetry Breaking
• Soft-Collinear Factorization in Effective Field Theory
• Gaugino Mass without Singlets
• Minimal Dark Matter
• Observations of the Crab Nebula with H.E.S.S
• Invariant Operators in Collinear Effective Theory
• PPPC 4 DM ID: A Poor Particle Physicist Cookbook for Dark Matter Indirect Detection
• Cosmology and Astrophysics of Minimal Dark Matter
• Non-Perturbative Effect on Dark Matter Annihilation and Gamma Ray Signature from Galactic Center
• Acceleration of petaelectronvolt protons in the Galactic Centre
• Discovery of Very-High-Energy Gamma-Rays from the Galactic Centre Ridge
• A novel determination of the local dark matter density
• Non-perturbative Effect on Thermal Relic Abundance of Dark Matter
• Explosive Dark Matter Annihilation
• Very high energy gamma rays from the direction of Sagittarius A*
• Dynamical modelling of the Galactic bulge and bar: the Milky Way's bar pattern speed, stellar, and dark matter mass distribution
• The Impact of Baryonic Physics on the Structure of Dark Matter Halos: the View from the FIRE Cosmological Simulations
• Calibration of cameras of the H.E.S.S. detector
• Mini-Split
• A high performance likelihood reconstruction of gamma-rays for Imaging Atmospheric Cherenkov Telescopes
• Search for dark matter annihilations towards the inner Galactic halo from 10 years of observations with H.E.S.S
• Search for a Dark Matter annihilation signal from the Galactic Center halo with H.E.S.S
• Search for photon line-like signatures from Dark Matter annihilations with H.E.S.S
• Monte Carlo design studies for the Cherenkov Telescope Array
• In Wino Veritas? Indirect Searches Shed Light on Neutralino Dark Matter
• Minimal Dark Matter: model and results
• Neutralino Dark Matter at 14 and 100 TeV
• Minimal Dark Matter predictions for galactic positrons, anti-protons, photons
• Wino Dark Matter Under Siege
• Evidence for dark matter in the inner Milky Way
• Made-to-Measure models of the Galactic Box/Peanut bulge: stellar and total mass in the bulge region
• Implications of High-Resolution Simulations on Indirect Dark Matter Searches
• Search for $\gamma$-ray line signals from dark matter annihilations in the inner Galactic halo from ten years of observations with H.E.S.S
• Search for long-lived charginos based on a disappearing-track signature in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Very high energy gamma rays from the composite SNR G0.9+0.1
• Universal behavior in the scattering of heavy, weakly interacting dark matter on nuclear targets
• Spectrum and variability of the Galactic Center VHE gamma-ray source HESS J1745-290
• Relic densities including Sommerfeld enhancements in the MSSM
• WIMP-nucleon scattering with heavy WIMP effective theory
• Electroweak Corrections in High Energy Processes using Effective Field Theory
• Factorization and Resummation for Dijet Invariant Mass Spectra
• Diffuse Galactic gamma-ray emission with H.E.S.S
• Electroweak Sudakov Corrections using Effective Field Theory
• Non-Global Logarithms, Factorization, and the Soft Substructure of Jets
• Resummation of Double-Differential Cross Sections and Fully-Unintegrated Parton Distribution Functions
• Heavy Dark Matter Annihilation from Effective Field Theory
• Self-consistent Calculation of the Sommerfeld Enhancement
• Relic density of wino-like dark matter in the MSSM
• Constraining heavy dark matter with cosmic-ray antiprotons
• The one-loop and Sommerfeld electroweak corrections to the Wino dark matter annihilation
• Electroweak Corrections using Effective Field Theory: Applications to the LHC
• Exploring a SNR/Molecular Cloud Association Within HESS J1745-303
• Indirect Detection Analysis: Wino Dark Matter Case Study
• Last Electroweak WIMP Standing: Pseudo-Dirac Higgsino Status and Compact Stars as Future Probes
• On the Annihilation Rate of WIMPs
• Baryonic and dark matter distribution in cosmological simulations of spiral galaxies
• Search for disappearing tracks as a signature of new long-lived particles in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Wino-like Minimal Dark Matter and future colliders
• Study of forward Z+jet production in pp collisions at $\sqrt{s}=7$ TeV
• Soft Collinear Effective Theory for Heavy WIMP Annihilation
• Toward Multi-Differential Cross Sections: Measuring Two Angularities on a Single Jet
• Search for Cosmic-Ray Electron and Positron Anisotropies with Seven Years of Fermi Large Area Telescope Data
• Prospects for Electroweakino Discovery at a 100 TeV Hadron Collider
• Complementarity of Dark Matter Searches in the pMSSM
• Constraints on Galactic Wino Densities from Gamma Ray Lines
• Resummed Photon Spectra for WIMP Annihilation
• Mapping Extragalactic Dark Matter Annihilation with Galaxy Surveys: A Systematic Study of Stacked Group Searches
• Factorization and Resummation for Generic Hierarchies between Jets
• Energetic $\gamma$-rays from TeV scale dark matter annihilation resummed
• Semi-Inclusive Wino and Higgsino Annihilation to LL'
• The One-Loop Correction to Heavy Dark Matter Annihilation
• Dark Matter in $\gamma$ lines: Galactic Center vs dwarf galaxies
• Gamma rays from the Galactic Centre region: a review
• Neutralinos in Vector Boson Fusion at High Energy Colliders

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• Sensitivity of the Cherenkov Telescope Array to a dark matter signal from the Galactic centre
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• Sommerfeld-corrected relic abundance of wino dark matter with NLO electroweak potentials
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• Sommerfeld-enhanced dark matter searches with dwarf spheroidal galaxies
• Cosmic perturbations, baryon asymmetry and dark matter from the minimal supersymmetric standard model
• Smallest Halos in Thermal Wino Dark Matter
• Strong Constraints on Dark Photon and Scalar Dark Matter Decay from INTEGRAL and AMS-02 data
• Dark Matter from 't Hooft Anomaly Matching
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• Dark Matter and Fundamental Physics Searches with IACTs
• Probing the Dark Matter of Three-loop Radiative Neutrino Mass Generation Model with the Cherenkov Telescope Array
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