Gamma rays and positrons from a decaying hidden gauge boson

Chuan Ren Chen; Fuminobu Takahashi; T. T. Yanagida

doi:10.1016/j.physletb.2008.11.048

Gamma rays and positrons from a decaying hidden gauge boson

Chuan Ren Chen^*, Fuminobu Takahashi, T. T. Yanagida

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

99 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	71-76
Number of pages	6
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	671
Issue number	1
DOIs	https://doi.org/10.1016/j.physletb.2008.11.048
Publication status	Published - 2009 Jan 12
Externally published	Yes

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1016/j.physletb.2008.11.048

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title = "Gamma rays and positrons from a decaying hidden gauge boson",

abstract = "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.",

author = "Chen, {Chuan Ren} and Fuminobu Takahashi and Yanagida, {T. T.}",

note = "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.",

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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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Gamma rays and positrons from a decaying hidden gauge boson

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