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

被引：49
作者：
Abazajian, Kevork N. [1 ]
Harding, J. Patrick [1 ,2 ]
机构：
[1] Univ Calif Irvine, Dept Phys & Astron, Ctr Cosmol, Irvine, CA 92697 USA
[2] Univ Maryland, Dept Phys, Maryland Ctr Fundamental Phys, College Pk, MD 20742 USA
来源：
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2012年 / 01期
基金：
美国国家科学基金会;
关键词：
dark matter theory; dark matter experiments; gamma ray experiments; INNER STRUCTURE; GALAXY; HALOS; CONTRACTION; SIMULATIONS; EVOLUTION; BARYONS; RAYS;
D O I：
10.1088/1475-7516/2012/01/041
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
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) over bar, t (t) over bar and W+W-. The constraints on annihilation into b (b) over bar is within an order of magnitude of the thermal cross section at similar to 3 TeV, while the tau(+)tau(-) channel is within a factor of similar to 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(+)e(-) 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.
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页数：19
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