Full One-loop Calculation of Neutralino Annihilation into Two Photons

Abstract

For the first time, a full one-loop calculation of the process $\chi \chi \to 2\gamma$ is performed, where $\chi$ is the lightest neutralino in the minimal supersymmetric extension of the Standard Model. This process is of interest for dark matter detection, since it would give a sharp $\gamma$ ray line with $E_{\gamma }=m_{\chi }$. We improve upon and correct published formulas, and give cross sections for supersymmetric models with $\chi$ masses between 30 GeV and several TeV. We find a new contribution, previously neglected, which enhances the $2\gamma$ rate for TeV higgsinos by up to an order of magnitude. As a byproduct, we obtain a new expression for the related process $\chi \chi \to 2gluons$, which on the other hand is generally smaller than previously calculated. There has been a recent claim that evidence for a 3.5 TeV higgsino annihilating into a $\gamma$ line may already exist from balloon emulsion and Air Cherenkov Telescope data. We comment on attractive features and problems with this interpretation.

21 pages, LaTeX, uses epsfig, 6 figures included. Pure higgsino limit corrected. Conclusions unchanged

References in corpus (5)

• Neutralino Relic Density including Coannihilations
• Light Higgsino Dark Matter
• Exploring the supersymmetric parameter space by direct search for WIMPs
• Astrophysical-Neutrino Detection with Angular and Energy Resolution
• Aspects of Neutrino Detection of Neutralino Dark Matter

Cited by in corpus (188)

• Particle Dark Matter: Evidence, Candidates and Constraints
• Minimal Dark Matter
• Non-Baryonic Dark Matter - Observational Evidence and Detection Methods
• DarkSUSY: Computing Supersymmetric Dark Matter Properties Numerically
• Dark matter annihilation at the galactic center
• Observability of Gamma Rays from Dark Matter Neutralino Annihilations in the Milky Way Halo
• Non-Perturbative Effect on Dark Matter Annihilation and Gamma Ray Signature from Galactic Center
• A Tentative Gamma-Ray Line from Dark Matter Annihilation at the Fermi Large Area Telescope
• Positron Propagation and Fluxes from Neutralino Annihilation in the Halo
• 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
• PeV-Scale Supersymmetry
• A review of indirect searches for particle dark matter
• New Positron Spectral Features from Supersymmetric Dark Matter - a Way to Explain the PAMELA Data?
• Significant Gamma Lines from Inert Higgs Dark Matter
• Galactic Searches for Dark Matter
• New Gamma-Ray Contributions to Supersymmetric Dark Matter Annihilation
• Search for Gamma-ray Spectral Lines with the Fermi Large Area Telescope and Dark Matter Implications
• Multi-frequency analysis of neutralino dark matter annihilations in the Coma cluster
• Fermi LAT Search for Dark Matter in Gamma-ray Lines and the Inclusive Photon Spectrum
• Antideuterons as a Signature of Supersymmetric Dark Matter
• In Wino Veritas? Indirect Searches Shed Light on Neutralino Dark Matter
• Constraining Dark Matter candidates from structure formation
• WIMPonium and Boost Factors for Indirect Dark Matter Detection
• Fermi LAT Search for Photon Lines from 30 to 200 GeV and Dark Matter Implications
• Wino Dark Matter Under Siege
• Prospects for Indirect Detection of Neutralino Dark Matter
• Clumpy Neutralino Dark Matter
• Little Higgs Dark Matter
• Spectral Gamma-ray Signatures of Cosmological Dark Matter Annihilation
• Neutrino Constraints on the Dark Matter Total Annihilation Cross Section
• DarkSUSY 6 : An Advanced Tool to Compute Dark Matter Properties Numerically
• Cosmic antiprotons as a probe for supersymmetric dark matter?
• The Dark Matter Annihilation Signal from Galactic Substructure: Predictions for GLAST
• Neutralino Annihilation into a Photon and a Z boson
• Unitarity and Higher-Order Corrections in Neutralino Dark Matter Annihilation into Two Photons
• The cosmic ray positron excess and neutralino dark matter
• Anisotropy of the cosmic gamma-ray background from dark matter annihilation
• 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
• Non-thermal dark matter via Affleck-Dine baryogenesis and its detection possibility
• The Hunt for New Physics at the Large Hadron Collider
• Fitting the Gamma-Ray Spectrum from Dark Matter with DMFIT: GLAST and the Galactic Center Region
• Neutralino annihilation into gamma-rays in the Milky Way and in external galaxies
• The Galactic Center as a Dark Matter Gamma-Ray Source
• Sensitivity Projections for Dark Matter Searches with the Fermi Large Area Telescope
• Hidden fermion as milli-charged dark matter in Stueckelberg Z' model
• Dark Matter Annihilation in Substructures Revised
• Gamma Ray Line Constraints on Effective Theories of Dark Matter
• Which fraction of the measured cosmic-ray antiprotons might be due to neutralino annihilation in the galactic halo?
• Global fits of GUT-scale SUSY models with GAMBIT
• Dark matter searches with Cherenkov telescopes: nearby dwarf galaxies or local galaxy clusters?
• PAMELA Satellite Data as a Signal of Non-Thermal Wino LSP Dark Matter
• Gamma Rays from Heavy Neutralino Dark Matter
• Using the CMB angular power spectrum to study Dark Matter-photon interactions
• A global fit of the MSSM with GAMBIT
• Full one-loop corrections to the relic density in the MSSM: A few examples
• Dark matter profiles and annihilation in dwarf spheroidal galaxies: prospectives for present and future gamma-ray observatories - I. The classical dSphs
• The Detectability of Neutralino Clumps via Atmospheric Cherenkov Telescopes
• Kinetic decoupling of neutralino dark matter
• Towards the Final Word on Neutralino Dark Matter
• Intense Gamma-Ray Lines from Hidden Vector Dark Matter Decay
• Direct Detection of the Wino- and Higgsino-like Neutralino Dark Matters at One-Loop Level
• Higgs in Space!
• Signatures of Majorana dark matter with t-channel mediators
• Direct Constraints on Minimal Supersymmetry from Fermi-LAT Observations of the Dwarf Galaxy Segue 1
• Can we discover dual-component thermal WIMP dark matter?
• Two photon annihilation of Kaluza-Klein dark matter
• Majorana Dark Matter with a Coloured Mediator: Collider vs Direct and Indirect Searches
• Dark Matter and Gamma-Rays From Draco: MAGIC, GLAST and CACTUS
• Hunting Dark Matter Gamma-Ray Lines with the Fermi LAT
• Updated CMB, X- and gamma-ray constraints on majoron dark matter
• Self-annihilation of the neutralino dark matter into two photons or a Z and a photon in the MSSM
• Prospects for Heavy WIMP Dark Matter with CTA: the Wino and Higgsino
• Last Electroweak WIMP Standing: Pseudo-Dirac Higgsino Status and Compact Stars as Future Probes
• Is the 130 GeV Line Real? A Search for Systematics in the Fermi-LAT Data
• Two Lines or Not Two Lines? That is the Question of Gamma Ray Spectra
• Decaying vs Annihilating Dark Matter in Light of a Tentative Gamma-Ray Line
• The WIMP Forest: Indirect Detection of a Chiral Square
• Can Dark Matter Annihilation Dominate the Extragalactic Gamma-Ray Background?
• Indirect detection of light neutralino dark matter in the NMSSM
• Can Supersymmetry Naturally Explain the Positron Excess?
• Relic density at one-loop with gauge boson pair production
• Challenges in Detecting Gamma-Rays From Dark Matter Annihilations in the Galactic Center
• Implications of a 130 GeV Gamma-Ray Line for Dark Matter
• TeV Scale Singlet Dark Matter
• Three Exceptions for Thermal Dark Matter with Enhanced Annihilation to Gamma Gamma
• Probing the Inert Doublet Dark Matter Model with Cherenkov Telescopes
• Internal bremsstrahlung signatures in light of direct dark matter searches
• A 130 GeV photon line from dark matter annihilation in the NMSSM
• Extracting the Gamma Ray Signal from Dark Matter Annihilation in the Galactic Center Region
• Illuminating the 130 GeV Gamma Line with Continuum Photons
• Resolving Small-Scale Dark Matter Structures Using Multi-Source Indirect Detection
• Direct and Indirect Detection of Neutralino Dark Matter In Selected Supersymmetry Breaking Scenarios
• Neutralino Gamma-ray Signals from Accreting Halo Dark Matter
• Enhanced diphoton rates at Fermi and the LHC
• Search for a gamma-ray line feature from a group of nearby Galaxy clusters with Fermi LAT Pass 8 data
• Explaining PAMELA and WMAP data through Coannihilations in Extended SUGRA with Collider Implications
• A Search for Dark Matter Annihilation with the Whipple 10m Telescope
• Search for Gamma-Ray Lines towards Galaxy Clusters with the Fermi-LAT
• Top-philic Vector-Like Portal to Scalar Dark Matter
• Gamma-ray boxes from axion-mediated dark matter
• Have Atmospheric Cerenkov Telescopes Observed Dark Matter?
• Adiabatic compression and indirect detection of supersymmetric dark matter
• Search for Dark Matter
• Gamma-ray Lines in the Fermi Data: is it a Bubble?
• Multiple Gamma Lines from Semi-Annihilation
• Relic density of neutralino dark matter in the MSSM with CP violation
• Gravitino dark matter and neutrino masses with bilinear R-parity violation
• Neutralino dark matter and the Fermi gamma-ray lines
• Explaining the GeV antiproton/$\gamma -$ray excesses and W-boson mass anomaly in an inert two Higgs doublet model
• 130 GeV Fermi gamma-ray line from dark matter decay
• Galactic Center Radio Constraints on Gamma-Ray Lines from Dark Matter Annihilation
• Dark Matter as a Guide Toward a Light Gluino at the LHC
• Dark Matter Annihilation around Intermediate Mass Black Holes: an update
• A universal framework for t-channel dark matter models
• Optimized analysis method for indirect dark matter searches with Imaging Air Cherenkov Telescopes
• Gamma Ray Lines from a Universal Extra Dimension
• Probing Charged Matter Through Higgs Diphoton Decay, Gamma Ray Lines, and EDMs
• The 130 GeV Fingerprint of Right-Handed Neutrino Dark Matter
• Dark matter annihilation from intermediate-mass black holes: Contribution to the extragalactic gamma-ray background
• Indirect searches of dark matter via polynomial spectral features
• Resonant scattering and recombination of pseudo-degenerate WIMPs
• Dark Matter annihilation in Draco: new considerations of the expected gamma flux
• PAMELA and FERMI-LAT limits on the neutralino-chargino mass degeneracy
• Bremsstrahlung and Gamma Ray Lines in 3 Scenarios of Dark Matter Annihilation
• Gamma rays from the Galactic Centre region: a review
• Dispersive Light Propagation at Cosmological Distances: Matter Effects
• Search for Gamma-ray Spectral Lines from Dark Matter Annihilation in Dwarf Galaxies with the High-Altitude Water Cherenkov Observatory
• Higgs funnel region of SUSY dark matter for small $\tan \beta$ and renormalization group effects on pseudoscalar Higgs boson with scalar mass non-universality
• Neutralino Dark Matter from MSSM Flat Directions in light of WMAP Result
• Light Higgsino in Heavy Gravitino Scenario with Successful Electroweak Symmetry Breaking
• Search for Gamma-ray Spectral Lines from Dark Matter Annihilation up to 100 TeV towards the Galactic Center with MAGIC
• Higher order dark matter annihilations in the Sun and implications for IceCube
• Splitting the split supersymmetry
• Dark Matter Decay to a Photon and a Neutrino: the Double Monochromatic Smoking Gun Scenario
• Singlet-Triplet Fermionic Dark Matter and LHC Phenomenology
• The 130 GeV gamma-ray line and generic dark matter model building constraints from continuum gamma rays, radio and antiproton data
• Effects of Velocity-Dependent Dark Matter Annihilation on the Energy Spectrum of the Extragalactic Gamma-ray Background
• Supersymmetry and Cosmology
• Gamma-ray Signals from Dark Matter Annihilation Via Charged Mediators
• The Gamma Ray Detection Capabilities of the Alpha Magnetic Spectrometer
• Zero-Range Effective Field Theory for Resonant Wino Dark Matter III. Annihilation Effects
• Electroweak Baryogenesis And The Fermi Gamma-Ray Line
• Non-thermal X-rays from the Ophiuchus galaxy cluster and dark matter annihilation
• Detecting interactions between dark matter and photons at high energy $e^{+}{e}^{-}$ colliders
• Galactic-Centre Gamma Rays in CMSSM Dark Matter Scenarios
• Distinguishing Supersymmetry From Universal Extra Dimensions or Little Higgs Models With Dark Matter Experiments
• New gamma ray signal from gravitationally boosted neutralinos at the galactic center
• Gamma-ray detection from neutralino annihilation in non--universal SUGRA scenarios
• Enhanced Line Signals from Annihilating Kaluza-Klein Dark Matter
• Impact of internal bremsstrahlung on the detection of gamma-rays from neutralinos
• A minimal supersymmetric scenario with only μat the weak scale
• TeV Dark Matter Searches in the Extragalactic Gamma-Ray Sky
• Indirect dark-matter detection with MadDM v3.2 -- Lines and Loops
• General calculation of the cross section for dark matter annihilations into two photons
• Lower Limits on the Strengths of Gamma Ray Lines from WIMP Dark Matter Annihilation
• Non-Universal Gaugino Masses, CDMS, and the LHC
• Particle Dark Matter Physics: An Update
• Indirect Signals from Dark Matter in Split Supersymmetry
• Anomalous spectral lines and relic quantum nonequilibrium
• Matching resummed endpoint and continuum $\gamma$-ray spectra from dark-matter annihilation
• Search for gamma-ray line signals around the black hole at the galactic center with DAMPE observation
• Gamma rays from Dark Matter Annihilation in the Central Region of the Galaxy
• $\gamma$-ray flux from Dark Matter Annihilation in Galactic Caustics
• Higgsino dark matter model consistent with galactic cosmic ray data and possibility of discovery at LHC-7
• 130 GeV gamma ray line and enhanced Higgs di-photon rate from Triplet-Singlet extended MSSM
• Determining Supersymmetric Parameters With Dark Matter Experiments
• Neutralino-neutralino annihilation to photon and gluon pairs in MSSM models
• Observing Higgs boson production through its decay into gamma-rays: A messenger for Dark Matter candidates
• Neutralino dark matter annihilation to monoenergetic gamma rays as a signal of low mass superstrings
• Gamma Lines from the Hidden Sector
• Enhanced lines and box-shaped features in the gamma-ray spectrum from annihilating dark matter in the NMSSM
• Dichromatic Dark Matter
• t-channel dark matter at the LHC -- a whitepaper
• Neutralino pair production in a $\gamma \gamma$ Collider
• Interpretations of the possible 42.7 GeV $\gamma$-ray line
• Constraining the monochromatic gamma-rays from dark matter annihilation by the LHC
• Requirements to Detect the Monoenergetic Photon Signature of Thermal Cold Dark Matter in PeV-Scale Split Supersymmetry
• Gamma ray lines: what will they tell us about SUSY?
• Non-Baryonic Dark Matter
• Connecting Dark Matter Annihilation to the Vertex Functions of Standard Model Fermions
• Monochromatic Gamma Rays from Dark Matter Annihilation to Leptons
• A Study of Dark Matter and QCD-Charged Mediators in the Quasi-Degenerate Regime
• Dark Matter and Fundamental Physics Searches with IACTs
• Dark Matter EFT, the Third -- Neutrino WIMPs
• Impact of baryons on the population of Galactic subhalos and implications for dark matter searches
• Neutralino-neutralino annihilation to gammaZ in MSSM
• Composite Higgsino