Gamma rays from Kaluza-Klein dark matter -: art. no. 131301

被引：171

作者：

Bergström, L ^{[1
]}

Bringmann, T ^{[1
]}

Eriksson, M ^{[1
]}

Gustafsson, M ^{[1
]}

机构：

[1] Stockholm Univ, Dept Phys, AlbaNova Univ Ctr, SE-10691 Stockholm, Sweden

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 94卷 / 13期

关键词：

D O I：

10.1103/PhysRevLett.94.131301

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A TeV gamma-ray signal from the direction of the Galactic center (GC) has been detected by the HESS experiment. Here, we investigate whether Kaluza-Klein (KK) dark matter annihilations near the GC can be the explanation. Including the contributions from internal bremsstrahlung as well as subsequent decays of quarks and tau leptons, we find a very flat gamma-ray spectrum which drops abruptly at the dark matter particle mass. For a KK mass of about 1 TeV, this gives a good fit to the HESS data below 1 TeV. A similar model, with gauge coupling roughly 3 times as large and a particle mass of about 10 TeV, would give both the correct relic density and a photon spectrum that fits the complete range of data.

引用

页数：4

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