TY - JOUR
T1 - Gamma rays and positrons from a decaying hidden gauge boson
AU - Chen, Chuan Ren
AU - Takahashi, Fuminobu
AU - Yanagida, T. T.
N1 - Funding Information:
C.R.C. and F.T. would like to thank M. Nojiri for useful discussions. This work was supported by World Premier International Research Center Initiative (WPI Initiative), MEXT, Japan.
PY - 2009/1/12
Y1 - 2009/1/12
N2 - 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 anomaly 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.
AB - 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 anomaly 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.
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U2 - 10.1016/j.physletb.2008.11.048
DO - 10.1016/j.physletb.2008.11.048
M3 - Article
AN - SCOPUS:57749120258
SN - 0370-2693
VL - 671
SP - 71
EP - 76
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
IS - 1
ER -