Kaluza-Klein dark matter, electrons and gamma-ray telescopes

被引:29
作者
Baltz, EA
Hooper, D
机构
[1] Stanford Univ, Kavli Inst Particle Astrophys & Cosmol, Stanford, CA 94309 USA
[2] Univ Oxford, Oxford OX1 3RH, England
来源
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2005年 / 07期
关键词
cosmic rays detectors; dark matter detectors; dark matter; extra dimensions;
D O I
10.1088/1475-7516/2005/07/001
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Kaluza - Klein dark matter particles can annihilate efficiently into electron - positron pairs, providing a discrete feature ( a sharp edge) in the cosmic e(+) e(-) spectrum at an energy equal to the particle's mass ( typically several hundred GeV to one TeV). Although this feature is probably beyond the reach of satellite or balloon-based cosmic ray experiments ( those that distinguish the charge and mass of the primary particle), gamma-ray telescopes may provide an alternative detection method. Designed to observe very high-energy gamma rays, ACTs also observe the diffuse flux of electron-induced electromagnetic showers. The GLAST satellite, designed for gamma-ray astronomy, will also observe any high-energy showers ( several hundred GeV and above) in its calorimeter. We show that high-significance detections of an electron - positron feature from Kaluza Klein dark matter annihilations are possible with GLAST, and also with ACTs such as HESS, VERITAS or MAGIC.
引用
收藏
页码:1 / 9
页数:9
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