An Effective Theory of Dirac Dark Matter

Abstract

A stable Dirac fermion with four-fermion interactions to leptons suppressed by a scale Lambda ~ 1 TeV is shown to provide a viable candidate for dark matter. The thermal relic abundance matches cosmology, while nuclear recoil direct detection bounds are automatically avoided in the absence of (large) couplings to quarks. The annihilation cross section in the early Universe is the same as the annihilation in our galactic neighborhood. This allows Dirac fermion dark matter to naturally explain the positron ratio excess observed by PAMELA with a minimal boost factor, given present astrophysical uncertainties. We use the Galprop program for propagation of signal and background; we discuss in detail the uncertainties resulting from the propagation parameters and, more importantly, the injected spectra. Fermi/GLAST has an opportunity to see a feature in the gamma-ray spectrum at the mass of the Dirac fermion. The excess observed by ATIC/PPB-BETS may also be explained with Dirac dark matter that is heavy. A supersymmetric model with a Dirac bino provides a viable UV model of the effective theory. The dominance of the leptonic operators, and thus the observation of an excess in positrons and not in anti-protons, is naturally explained by the large hypercharge and low mass of sleptons as compared with squarks. Minimizing the boost factor implies the right-handed selectron is the lightest slepton, which is characteristic of our model. Selectrons (or sleptons) with mass less than a few hundred GeV are an inescapable consequence awaiting discovery at the LHC.

11 pages, 8 figures

References in corpus (28)

• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• Observation of an anomalous positron abundance in the cosmic radiation
• A Theory of Dark Matter
• First results from DAMA/LIBRA and the combined results with DAMA/NaI
• 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
• A Search for WIMPs with the First Five-Tower Data from CDMS
• LHC Signals for a SuperUnified Theory of Dark Matter
• New Positron Spectral Features from Supersymmetric Dark Matter - a Way to Explain the PAMELA Data?
• Constraints on WIMP Dark Matter from the High Energy PAMELA $\bar{p}/p$ data
• Flavor in Supersymmetry with an Extended R-symmetry
• Inelastic Dark Matter in Light of DAMA/LIBRA
• Minimal Dark Matter predictions for galactic positrons, anti-protons, photons
• Evidence Of Dark Matter Annihilations In The WMAP Haze
• Investigating electron interacting dark matter
• PAMELA and dark matter
• Gamma rays and positrons from a decaying hidden gauge boson
• Cosmic rays from Leptonic Dark Matter
• Cosmic Rays from Dark Matter Annihilation and Big-Bang Nucleosynthesis
• Possible causes of a rise with energy of the cosmic ray positron fraction
• Early Annihilation and Diffuse Backgrounds in 1/v WIMP models
• Positron/Gamma-Ray Signatures of Dark Matter Annihilation and Big-Bang Nucleosynthesis
• Dark Matter in B-L Extended MSSM Models
• Two dark matter components in N_{DM}MSSM and dark matter extension of the minimal supersymmetric standard model and the high energy positron spectrum in PAMELA/HEAT data
• Dirac Neutrino Dark Matter
• Pseudo-Dirac Bino Dark Matter
• Nuclear scattering of dark matter coupled to a new light scalar
• Antimatter cosmic rays from dark matter annihilation: First results from an N-body experiment

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• On possible interpretations of the high energy electron-positron spectrum measured by the Fermi Large Area Telescope
• Decaying Dark Matter can explain the electron/positron excesses
• Gamma-ray and radio tests of the e+e- excess from DM annihilations
• Dark Matter Interpretations of the Electron/Positron Excesses after FERMI
• A statistical procedure for the identification of positrons in the PAMELA experiment
• Dark Matter and Pulsar Origins of the Rising Cosmic Ray Positron Fraction in Light of New Data From AMS
• A Next-Generation Liquid Xenon Observatory for Dark Matter and Neutrino Physics
• HAWC Observations Strongly Favor Pulsar Interpretations of the Cosmic-Ray Positron Excess
• The Case for a 700+ GeV WIMP: Cosmic Ray Spectra from PAMELA, Fermi and ATIC
• High Energy Positrons From Annihilating Dark Matter
• Supersoft Supersymmetry is Super-Safe
• Bounds on Cross-sections and Lifetimes for Dark Matter Annihilation and Decay into Charged Leptons from Gamma-ray Observations of Dwarf Galaxies
• Nonabelian dark matter: models and constraints
• On the Importance of Electroweak Corrections for Majorana Dark Matter Indirect Detection
• Is the PAMELA anomaly caused by the supernova explosions near the Earth?
• Phenomenology of $U(1{)}_{L_{\mu }-L_{\tau }}$ charged dark matter at PAMELA/FERMI and colliders
• Lessons from HAWC PWNe observations: the diffusion constant is not a constant; Pulsars remain the likeliest sources of the anomalous positron fraction; Cosmic rays are trapped for long periods of time in pockets of inefficient diffusion
• Dark Matter with Dirac and Majorana Gaugino Masses
• Where do the AMS-02 anti-helium events come from?
• Closing in on Asymmetric Dark Matter I: Model independent limits for interactions with quarks
• Covariantizing the interaction between dark energy and dark matter
• Dark matter and sub-GeV hidden U(1) in GMSB models
• Decaying Dark Matter as a Probe of Unification and TeV Spectroscopy
• Dark Matter Sees The Light
• White Dwarf Pulsars as Possible Cosmic Ray Electron-Positron Factories
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• Observational constraints on dark matter scattering with electrons
• Pseudo-Dirac Dark Matter Leaves a Trace
• The $m_D-b_M$ Problem of Dirac Gauginos and its Solutions
• Radio and gamma-ray constraints on dark matter annihilation in the Galactic center
• Substructure Boosts to Dark Matter Annihilation from Sommerfeld Enhancement
• Explaining PAMELA and WMAP data through Coannihilations in Extended SUGRA with Collider Implications
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• Annihilation vs. Decay: Constraining dark matter properties from a gamma-ray detection
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• Squark Flavor Violation at the LHC
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• Electroweak Baryogenesis in R-symmetric Supersymmetry
• A Unified Dark Matter Model in sUED
• Type II Seesaw and the PAMELA/ATIC Signals
• Mixed Gauginos Sending Mixed Messages to the LHC
• The Sensitivity of the IceCube Neutrino Detector to Dark Matter Annihilating in Dwarf Galaxies
• Fermi/LAT observations of Dwarf Galaxies highly constrain a Dark Matter Interpretation of Excess Positrons seen in AMS-02, HEAT, and PAMELA
• Features in the Spectrum of Cosmic-Ray Positrons from Pulsars
• Effective Theory for Dark Matter and a New Force in the Dark Matter Sector
• Dark Photons from Captured Inelastic Dark Matter Annihilation: Charged Particle Signatures
• Late decaying 2-component dark matter scenario as an explanation of the AMS-02 positron excess
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• Dark Matter in the Singlet Extension of MSSM: Explanation of Pamela and Implication on Higgs Phenomenology
• Probing dark matter models with neutrinos from the Galactic center
• Gamma-ray signatures of annihilation to charged leptons in dark matter substructure
• Utilizing cosmic-ray positron and electron observations to probe the averaged properties of Milky Way pulsars
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• Global fits of simplified models for dark matter with GAMBIT I. Scalar and fermionic models with s-channel vector mediators
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• Revisiting GeV-scale annihilating dark matter with the AMS-02 positron fraction
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• Cosmic positron and antiproton constraints on the gauge-Higgs Dark Matter
• Synchrotron Emission From Young And Nearby Pulsars
• Constraints on dark matter annihilation to fermions and a photon
• Possible counterpart signal of the Fermi bubbles at the cosmic-ray positrons
• Inverse Compton gamma-rays from Galactic dark matter annihilation: Anisotropy signatures
• Dark matter in natural supersymmetric extensions of the Standard Model
• Dark Matter EFT, the Third -- Neutrino WIMPs
• A New Approach to Searching for Dark Matter Signals in Fermi-LAT Gamma Rays
• Study of sub-GeV Dipolar Dark States at SND@LHC within Invisible Bounds on Meson Decays
• Higgs Yukawa coupling constraints on a benchmark one-loop radiative mass model for the bottom, charm and tau
• Dark Matter Effective Field Theory and an Application to Vector Dark Matter