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Title: Can multistate dark matter annihilation explain the high-energy cosmic ray lepton anomalies?

Abstract

Multistate dark matter (DM) models with small mass splittings and couplings to light hidden sector bosons have been proposed as an explanation for the PAMELA/Fermi/H.E.S.S. high-energy lepton excesses. We investigate this proposal over a wide range of DM density profiles, in the framework of concrete models with doublet or triplet dark matter and a hidden SU(2) gauge sector that mixes with standard model hypercharge. The gauge coupling is bounded from below by the DM relic density, and the Sommerfeld enhancement factor is explicitly computable for given values of the DM and gauge boson masses M, {mu} and the (largest) dark matter mass splitting {delta}M{sub 12}. Sommerfeld enhancement is stronger at the galactic center than near the Sun because of the radial dependence of the DM velocity profile, which strengthens the inverse Compton (IC) gamma ray constraints relative to usual assumptions. We find that the PAMELA/Fermi/H.E.S.S. lepton excesses are marginally compatible with the model predictions, and with CMB and Fermi gamma ray constraints, for M congruent with 800 GeV, {mu} < or approx. 200 MeV, and a dark matter profile with noncuspy Einasto parameters {alpha} > or approx. 0.20, r{sub s{approx}}30 kpc. We also find that the annihilating DM must providemore » only a subdominant (< or approx. 0.4) component of the total DM mass density, since otherwise the boost factor due to Sommerfeld enhancement is too large.« less

Authors:
 [1];  [1]
  1. CERN Theory Division, CERN, Case C01600, CH-1211 Geneve (Switzerland)
Publication Date:
OSTI Identifier:
21410092
Resource Type:
Journal Article
Journal Name:
Physical Review. D, Particles Fields
Additional Journal Information:
Journal Volume: 82; Journal Issue: 2; Other Information: DOI: 10.1103/PhysRevD.82.023503; (c) 2010 The American Physical Society; Journal ID: ISSN 0556-2821
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ANNIHILATION; BOSONS; COSMIC RADIATION; COUPLING; DENSITY; FORECASTING; GAMMA RADIATION; GAUGE INVARIANCE; GEV RANGE 100-1000; HYPERCHARGE; LEPTONS; MASS; MEV RANGE 100-1000; NONLUMINOUS MATTER; STANDARD MODEL; SU-2 GROUPS; VELOCITY; ELECTROMAGNETIC RADIATION; ELEMENTARY PARTICLES; ENERGY RANGE; FERMIONS; FIELD THEORIES; GEV RANGE; GRAND UNIFIED THEORY; INTERACTIONS; INVARIANCE PRINCIPLES; IONIZING RADIATIONS; LIE GROUPS; MATHEMATICAL MODELS; MATTER; MEV RANGE; PARTICLE INTERACTIONS; PARTICLE MODELS; PARTICLE PROPERTIES; PHYSICAL PROPERTIES; QUANTUM FIELD THEORY; RADIATIONS; SU GROUPS; SYMMETRY GROUPS; UNIFIED GAUGE MODELS

Citation Formats

Cirelli, Marco, Insitut de Physique Theorique, CNRS URA 2306 and CEA/Saclay, F-91191 Gif-sur-Yvette, Cline, James M, and Physics Department, McGill University, 3600 University Street, Montreal, Quebec, H3A 2T8. Can multistate dark matter annihilation explain the high-energy cosmic ray lepton anomalies?. United States: N. p., 2010. Web. doi:10.1103/PHYSREVD.82.023503.
Cirelli, Marco, Insitut de Physique Theorique, CNRS URA 2306 and CEA/Saclay, F-91191 Gif-sur-Yvette, Cline, James M, & Physics Department, McGill University, 3600 University Street, Montreal, Quebec, H3A 2T8. Can multistate dark matter annihilation explain the high-energy cosmic ray lepton anomalies?. United States. doi:10.1103/PHYSREVD.82.023503.
Cirelli, Marco, Insitut de Physique Theorique, CNRS URA 2306 and CEA/Saclay, F-91191 Gif-sur-Yvette, Cline, James M, and Physics Department, McGill University, 3600 University Street, Montreal, Quebec, H3A 2T8. Thu . "Can multistate dark matter annihilation explain the high-energy cosmic ray lepton anomalies?". United States. doi:10.1103/PHYSREVD.82.023503.
@article{osti_21410092,
title = {Can multistate dark matter annihilation explain the high-energy cosmic ray lepton anomalies?},
author = {Cirelli, Marco and Insitut de Physique Theorique, CNRS URA 2306 and CEA/Saclay, F-91191 Gif-sur-Yvette and Cline, James M and Physics Department, McGill University, 3600 University Street, Montreal, Quebec, H3A 2T8},
abstractNote = {Multistate dark matter (DM) models with small mass splittings and couplings to light hidden sector bosons have been proposed as an explanation for the PAMELA/Fermi/H.E.S.S. high-energy lepton excesses. We investigate this proposal over a wide range of DM density profiles, in the framework of concrete models with doublet or triplet dark matter and a hidden SU(2) gauge sector that mixes with standard model hypercharge. The gauge coupling is bounded from below by the DM relic density, and the Sommerfeld enhancement factor is explicitly computable for given values of the DM and gauge boson masses M, {mu} and the (largest) dark matter mass splitting {delta}M{sub 12}. Sommerfeld enhancement is stronger at the galactic center than near the Sun because of the radial dependence of the DM velocity profile, which strengthens the inverse Compton (IC) gamma ray constraints relative to usual assumptions. We find that the PAMELA/Fermi/H.E.S.S. lepton excesses are marginally compatible with the model predictions, and with CMB and Fermi gamma ray constraints, for M congruent with 800 GeV, {mu} < or approx. 200 MeV, and a dark matter profile with noncuspy Einasto parameters {alpha} > or approx. 0.20, r{sub s{approx}}30 kpc. We also find that the annihilating DM must provide only a subdominant (< or approx. 0.4) component of the total DM mass density, since otherwise the boost factor due to Sommerfeld enhancement is too large.},
doi = {10.1103/PHYSREVD.82.023503},
journal = {Physical Review. D, Particles Fields},
issn = {0556-2821},
number = 2,
volume = 82,
place = {United States},
year = {2010},
month = {7}
}