Gamma rays and positrons from a decaying hidden gauge boson

被引：96
作者：
Chen, Chuan-Ren [1 ]
Takahashi, Fuminobu [1 ]
Yanagida, T. T. [1 ,2 ]
机构：
[1] Univ Tokyo, Inst Phys & Math, Chiba 2778568, Japan
[2] Univ Tokyo, Dept Phys, Tokyo 1130033, Japan
来源：
PHYSICS LETTERS B | 2009年 / 671卷 / 01期
关键词：
DARK-MATTER; INFLATON DECAY; PROPAGATION; FRACTION;
D O I：
10.1016/j.physletb.2008.11.048
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We study a scenario that a hidden gauge boson constitutes the dominant component of dark matter and decays into the standard model particles through a gauge kinetic mixing. Interestingly, gamma rays and positrons produced from the decay of hidden gauge boson can explain both the EGRET excess of diffuse gamma rays and the HEAT anomally in the positron fraction. The spectra of the gamma rays and the positrons have distinctive features: the absence of line emission of the gamma ray and a sharp peak in the positron fraction, Such features may be observed by the FGST and PAMELA satellites. (C) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码：71 / 76
页数：6
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