A Froggatt-Nielsen Model for Leptophilic Scalar Dark Matter Decay

Abstract

We construct a model of decaying, TeV-scale scalar dark matter motivated by data from the PAMELA and Fermi-LAT experiments. By introducing an appropriate Abelian discrete symmetry and an intermediate scale of vector-like states that are responsible for generating lepton Yukawa couplings, we show that Planck-suppressed corrections may lead to decaying dark matter that is leptophilic and has the desired lifetime. The dark matter candidate decays primarily to lepton/anti-lepton pairs, and at a subleading rate to final states with a lepton, anti-lepton and standard model Higgs boson. We show that the model can reproduce the observed positron flux and positron fraction while remaining consistent with the bounds on the cosmic ray antiproton flux.

21 pages LaTeX, 6 figures. v2: refererence added

References in corpus (37)

• Observation of an anomalous positron abundance in the cosmic radiation
• Gauge Singlet Scalars as Cold Dark Matter
• Measurement of the Cosmic Ray e+ plus e- spectrum from 20 GeV to 1 TeV with the Fermi Large Area Telescope
• A new measurement of the antiproton-to-proton flux ratio up to 100 GeV in the cosmic radiation
• PAMELA results on the cosmic-ray antiproton flux from 60 MeV to 180 GeV in kinetic energy
• Fermi LAT observations of cosmic-ray electrons from 7 GeV to 1 TeV
• Cosmic-ray positron fraction measurement from 1 to 30 GeV with AMS-01
• Decaying Dark Matter can explain the electron/positron excesses
• PAMELA data and leptonically decaying dark matter
• Pulsars versus Dark Matter Interpretation of ATIC/PAMELA
• Bounds on Cross-sections and Lifetimes for Dark Matter Annihilation and Decay into Charged Leptons from Gamma-ray Observations of Dwarf Galaxies
• Antimatter Signatures of Gravitino Dark Matter Decay
• Dark Matter: The Leptonic Connection
• Cosmic rays from Leptonic Dark Matter
• Constraints on Decaying Dark Matter from Fermi Observations of Nearby Galaxies and Clusters
• Cosmic Rays from Leptophilic Dark Matter Decay via Kinetic Mixing
• Dark matter and pulsar signals for Fermi LAT, PAMELA, ATIC, HESS and WMAP data
• Decaying Dark Matter as a Probe of Unification and TeV Spectroscopy
• The Leptonic Higgs as a Messenger of Dark Matter
• Decaying Hidden Gauge Boson and the PAMELA and ATIC/PPB-BETS Anomalies
• Anomaly Induced Dark Matter Decay and PAMELA/ATIC Experiments
• R-violating Decay of Wino Dark Matter and electron/positron Excesses in the PAMELA/Fermi Experiments
• T(13) Flavor Symmetry and Decaying Dark Matter
• Universally Leptophilic Dark Matter From Non-Abelian Discrete Symmetry
• Probing Unified Origin of Dark Matter and Baryon Asymmetry at PAMELA/Fermi
• Gamma-Ray Lines from Radiative Dark Matter Decay
• Indirect detection of gravitino dark matter including its three-body decays
• Galactic Signatures of Decaying Dark Matter
• PAMELA/ATIC anomaly from the meta-stable extra dark matter component and the leptophilic Yukawa interaction
• Decaying neutralino dark matter in anomalous $U(1{)}_H$ models
• Gamma-rays from Nearby Clusters: Constraints on Selected Decaying Dark Matter Models
• Decaying Dark Matter from Dark Instantons
• R-parity Violating Right-Handed Neutrino in Gravitino Dark Matter Scenario
• Decaying Dark Matter in Supersymmetric Model and Cosmic-Ray Observations
• Decaying dark matter with heavy axino
• Deep Correlation Between Cosmic-Ray Anomaly and Neutrino Masses
• Dynamical Matter-Parity Breaking and Gravitino Dark Matter

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• Decaying Asymmetric Dark Matter Relaxes the AMS-Fermi Tension
• EFT analysis of leptophilic dark matter at future electron-positron colliders in the mono-photon and mono-$Z$ channels
• A general study of decaying scalar dark matter: existing limits and projected radio signals at the SKA
• Neutrinos from the Sun can discover dark matter-electron scattering
• Pseudo-Familon Dark Matter
• Ekpyrotic Reheating and Fate of Inflaton