Gamma rays and positrons from a decaying hidden gauge boson

2008/09/30 by Chuan-Ren Chen, Fuminobu Takahashi, Tsutomu T. Yanagida +1 · 10 citations
Physics and Astronomy · #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Particle physics theoretical and experimental studies #astro-ph #hep-ph

paper · pdf · doi:10.1016/j.physletb.2008.11.048

published as Phys.Lett.B671:71-76,2009 · 16 pages, 4 figures, adding PAMELA data, the version accepted by PLB

openalex publication_date 2008/11/28 · arxiv created 2008/12/18 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

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.

Citations

• Inflaton decay in supergravity
• Topology of cosmic domains and strings
• Gravitational field of vacuum domain walls and strings

Cited by

• Neutrino Masses, Leptogenesis and Decaying Dark Matter
• Dark matter with a late decaying dark partner
• Neutralino dark matter in the USSM
• Decaying into the hidden sector
• Exploration of decaying dark matter in a left-right symmetric model
• Effective theory of Dirac dark matter
• Dirac gauginos in general gauge mediation
• Limits on threshold and “Sommerfeld” enhancements in dark matter annihilation
• Cosmice±s,p¯s,γs, and neutrinos in leptocentric dark matter models
• Neutrino signals from dark matter decay