The PAMELA and ATIC Excesses From a Nearby Clump of Neutralino Dark Matter

Abstract

In this letter, we suggest that a nearby clump of 600-1000 GeV neutralinos may be responsible for the excesses recently observed in the cosmic ray positron and electron spectra by the PAMELA and ATIC experiments. Although neutralino dark matter annihilating throughout the halo of the Milky Way is predicted to produce a softer spectrum than is observed, and violate constraints from cosmic ray antiproton measurements, a large nearby (within 1-2 kiloparsecs of the Solar System) clump of annihilating neutralinos can lead to a spectrum which is consistent with PAMELA and ATIC, while also producing an acceptable antiproton flux. Furthermore, the presence of a large dark matter clump can potentially accommodate the very large annihilation rate required to produce the PAMELA and ATIC signals.

arXiv comment4 pages, 2 figures

References in corpus (23)

• The Structure of Cold Dark Matter Halos
• A Theory of Dark Matter
• Production and propagation of cosmic-ray positrons and electrons
• EGRET Observations of the Extragalactic Gamma Ray Emission
• A new measurement of the antiproton-to-proton flux ratio up to 100 GeV in the cosmic radiation
• Model-independent implications of the e+, e-, anti-proton cosmic ray spectra on properties of Dark Matter
• Pulsars as the Sources of High Energy Cosmic Ray Positrons
• Positron Propagation and Fluxes from Neutralino Annihilation in the Halo
• Constraints on WIMP Dark Matter from the High Energy PAMELA $\bar{p}/p$ data
• Gamma-ray and radio tests of the e+e- excess from DM annihilations
• The cosmic ray positron excess and neutralino dark matter
• PAMELA and dark matter
• Searching for Dark Matter with Future Cosmic Positron Experiments
• Cosmic rays from Leptonic Dark Matter
• Supersymmetry and the positron excess in cosmic rays
• Dark Matter and Gamma-Rays From Draco: MAGIC, GLAST and CACTUS
• Positrons from particle dark-matter annihilation in the Galactic halo: propagation Green's functions
• Can Supersymmetry Naturally Explain the Positron Excess?
• Limits on Supersymmetric Dark Matter From EGRET Observations of the Galactic Center Region
• Constraining Supersymmetric Dark Matter With Synchrotron Measurements
• Constraining global properties of the Draco dwarf spheroidal galaxy
• Kaluza-Klein Dark Matter, Electrons and Gamma Ray Telescopes
• Local dark matter clumps and the cosmic ray positron excess

Cited by in corpus (68)

• Pulsars versus Dark Matter Interpretation of ATIC/PAMELA
• Astrophysical models for the origin of the positron "excess"
• Inverse Compton constraints on the Dark Matter e+e- excesses
• High Energy Positrons From Annihilating Dark Matter
• Bounds on Cross-sections and Lifetimes for Dark Matter Annihilation and Decay into Charged Leptons from Gamma-ray Observations of Dwarf Galaxies
• Is the PAMELA anomaly caused by the supernova explosions near the Earth?
• $e^{\pm }$ Excesses in the Cosmic Ray Spectrum and Possible Interpretations
• Searches for Cosmic-Ray Electron Anisotropies with the Fermi Large Area Telescope
• White Dwarf Pulsars as Possible Cosmic Ray Electron-Positron Factories
• Cosmic-Ray Electron Excess from Pulsars is Spiky or Smooth?: Continuous and Multiple Electron/Positron injections
• Dark matter vs. astrophysics in the interpretation of AMS-02 electron and positron data
• PAMELA, DAMA, INTEGRAL and Signatures of Metastable Excited WIMPs
• Radio and gamma-ray constraints on dark matter annihilation in the Galactic center
• Cosmic ray lepton puzzle in the light of cosmological N-body simulations
• Anomalous positron excess from Lorentz-violating QED
• TASI 2008 Lectures on Dark Matter
• Explaining PAMELA and WMAP data through Coannihilations in Extended SUGRA with Collider Implications
• Dark matter and collider phenomenology of split-UED
• CosRayMC: a global fitting method in studying the properties of the new sources of cosmic e${}^{\pm }$ excesses
• The impact of the phase-space density on the indirect detection of dark matter
• ATIC, PAMELA, HESS, Fermi and nearby Dark Matter subhalos
• Dark Matter Indirect Signatures
• Extended MSSM Neutralinos as the Source of the PAMELA Positron Excess
• A Gamma-Ray Burst/Pulsar for Cosmic-Ray Positrons with a Dark Matter-like Spectrum
• Dark Matter as a Guide Toward a Light Gluino at the LHC
• Cosmic Gamma-ray from Inverse Compton Process in Unstable Dark Matter Scenario
• Positrons from Primordial Black Hole Microquasars and Gamma-ray Bursts
• A Dark Matter Model with Non-Abelian Gauge Symmetry
• Imprint of Multi-component Dark Matter on AMS-02
• Constraining the Sommerfeld enhancement with Cherenkov telescope observations of dwarf galaxies
• Intermediate Mass Black Holes and Nearby Dark Matter Point Sources: A Critical Reassessment
• Type II Seesaw and the PAMELA/ATIC Signals
• Dark matter detection in the BMSSM
• Study of the Gamma-ray Spectrum from the Galactic Center in view of Multi-TeV Dark Matter Candidates
• The detection of sub-solar mass dark matter halos
• Systematic study of the uncertainties in fitting the cosmic positron data by AMS-02
• Late decaying 2-component dark matter scenario as an explanation of the AMS-02 positron excess
• A Tight Connection Between Direct and Indirect Detection of Dark Matter through Higgs Portal Couplings to a Hidden Sector
• Black Holes in our Galactic Halo: Compatibility with FGST and PAMELA Data and Constraints on the First Stars
• Dark Matter in the Singlet Extension of MSSM: Explanation of Pamela and Implication on Higgs Phenomenology
• Primordial Black Hole as a Source of the Boost Factor
• Gamma-ray signatures of annihilation to charged leptons in dark matter substructure
• Decaying Hidden Dark Matter in Warped Compactification
• Astrophysical Implications of a Visible Dark Matter Sector from a Custodially Warped-GUT
• Pulsars as the Source of the WMAP Haze
• Cosmic Ray Anomalies and Dark Matter Annihilation to Muons via a Higgs Portal Hidden Sector
• Absolute electron and positron fluxes from PAMELA/Fermi and Dark Matter
• Clumpiness enhancement of charged cosmic rays from dark matter annihilation with Sommerfeld effect
• Positrons in Cosmic Rays from Dark Matter Annihilations for Uplifted Higgs Regions in MSSM
• Exploring SUSY light Higgs boson scenarios via dark matter experiments
• Enhanced Dark Matter Annihilation Rate for Positron and Electron Excesses from Q-ball Decay
• Neutrino Masses, Leptogenesis and Decaying Dark Matter
• MiXDM: Cosmic Ray Signals from Multiple States of Dark Matter
• Dark Stars and Boosted Dark Matter Annihilation Rates
• The cosmic-ray positron excess from a local Dark Matter over-density
• On discrepancy between ATIC and Fermi data
• Extracting the size of the cosmic electron-positron anomaly
• Superparticle Signatures: from PAMELA to the LHC
• Can substructure in the Galactic Halo explain the ATIC and PAMELA results?
• The distribution of annihilation luminosities in dark matter substructure
• An observable electron-positron anisotropy cannot be generated by dark matter
• Fermi Constrains Dark Matter Origin of High Energy Positron Anomaly
• Dark Matter Annihilation and the PAMELA, FERMI and ATIC Anomalies
• Implication of the PAMELA antiproton data for dark matter indirect detection at LHC
• AMS-02 fits Dark Matter
• Dark matter in natural supersymmetric extensions of the Standard Model
• Analysis of the Positron Fraction and the Spectrum of the Electronic Component in Cosmic Rays
• Measurement of High Energy Gamma Rays from 200 MeV to 1 TeV with the Alpha Magnetic Spectrometer on the International Space Station