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Title: Constraints on WIMP and Sommerfeld-enhanced dark matter annihilation from HESS observations of the galactic center

Abstract

We examine the constraints on models of weakly interacting massive particle (WIMP) dark matter from the recent observations of the Galactic Center by the High Energy Spectroscopic System (HESS) telescope. We analyze canonical WIMP annihilation into Standard Model particle final states, including b b-bar , t t-bar and W{sup +}W{sup −}. The constraints on annihilation into b b-bar is within an order of magnitude of the thermal cross section at ∼ 3 TeV, while the τ{sup +}τ{sup −} channel is within a factor of ∼ 2 of thermal. We also study constraints on Sommerfeld-enhanced dark matter annihilation models, and find that the gamma-ray observational constraints here rule out all of the parameter space consistent with dark matter annihilation interpretations of PAMELA and the Fermi-LAT e{sup +}e{sup −} spectrum, in specific classes of models, and strongly constrains these interpretations in other classes. The gamma-ray constraints we find are more constraining on these models, in many cases, than current relic density, cosmic microwave background, halo shape and naturalness constraints.

Authors:
Publication Date:
OSTI Identifier:
22280185
Resource Type:
Journal Article
Journal Name:
Journal of Cosmology and Astroparticle Physics
Additional Journal Information:
Journal Volume: 2012; Journal Issue: 01; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1475-7516
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ANNIHILATION; ASTROPHYSICS; COSMOLOGY; CROSS SECTIONS; DENSITY; GAMMA RADIATION; LIMITING VALUES; NONLUMINOUS MATTER; POSITRONS; RELICT RADIATION; STANDARD MODEL; TAU PARTICLES; TEV RANGE; W MINUS BOSONS; W PLUS BOSONS; WIMPS

Citation Formats

Abazajian, Kevork N., and Harding, J. Patrick, E-mail: kevork@uci.edu, E-mail: hard0923@umd.edu. Constraints on WIMP and Sommerfeld-enhanced dark matter annihilation from HESS observations of the galactic center. United States: N. p., 2012. Web. doi:10.1088/1475-7516/2012/01/041.
Abazajian, Kevork N., & Harding, J. Patrick, E-mail: kevork@uci.edu, E-mail: hard0923@umd.edu. Constraints on WIMP and Sommerfeld-enhanced dark matter annihilation from HESS observations of the galactic center. United States. https://doi.org/10.1088/1475-7516/2012/01/041
Abazajian, Kevork N., and Harding, J. Patrick, E-mail: kevork@uci.edu, E-mail: hard0923@umd.edu. Sun . "Constraints on WIMP and Sommerfeld-enhanced dark matter annihilation from HESS observations of the galactic center". United States. https://doi.org/10.1088/1475-7516/2012/01/041.
@article{osti_22280185,
title = {Constraints on WIMP and Sommerfeld-enhanced dark matter annihilation from HESS observations of the galactic center},
author = {Abazajian, Kevork N. and Harding, J. Patrick, E-mail: kevork@uci.edu, E-mail: hard0923@umd.edu},
abstractNote = {We examine the constraints on models of weakly interacting massive particle (WIMP) dark matter from the recent observations of the Galactic Center by the High Energy Spectroscopic System (HESS) telescope. We analyze canonical WIMP annihilation into Standard Model particle final states, including b b-bar , t t-bar and W{sup +}W{sup −}. The constraints on annihilation into b b-bar is within an order of magnitude of the thermal cross section at ∼ 3 TeV, while the τ{sup +}τ{sup −} channel is within a factor of ∼ 2 of thermal. We also study constraints on Sommerfeld-enhanced dark matter annihilation models, and find that the gamma-ray observational constraints here rule out all of the parameter space consistent with dark matter annihilation interpretations of PAMELA and the Fermi-LAT e{sup +}e{sup −} spectrum, in specific classes of models, and strongly constrains these interpretations in other classes. The gamma-ray constraints we find are more constraining on these models, in many cases, than current relic density, cosmic microwave background, halo shape and naturalness constraints.},
doi = {10.1088/1475-7516/2012/01/041},
url = {https://www.osti.gov/biblio/22280185}, journal = {Journal of Cosmology and Astroparticle Physics},
issn = {1475-7516},
number = 01,
volume = 2012,
place = {United States},
year = {2012},
month = {1}
}