Astronomy and Astrophysics – Astrophysics – High Energy Astrophysical Phenomena
Scientific paper
2010-09-26
Astronomy and Astrophysics
Astrophysics
High Energy Astrophysical Phenomena
21 pages, 6 figures
Scientific paper
Indirect Dark Matter searches are based on the observation of secondary particles produced by the annihilation or decay of Dark Matter. Among them, gamma-rays are perhaps the most promising messengers, as they do not suffer deflection or absorption on Galactic scales, so their observation would directly reveal the position and the energy spectrum of the emitting source. Here, we study the detailed gamma-ray energy spectrum of Kaluza--Klein Dark Matter in a theory with 5 Universal Extra Dimensions. We focus in particular on the two body annihilation of Dark Matter particles into a photon and another particle, which produces monochromatic photons, resulting in a line in the energy spectrum of gamma rays. Previous calculations in the context of the five dimensional UED model have computed the line signal from annihilations into \gamma \gamma, but we extend these results to include \gamma Z and \gamma H final states. We find that these spectral lines are subdominant compared to the predicted \gamma \gamma signal, but they would be important as follow-up signals in the event of the observation of the \gamma \gamma line, in order to distinguish the 5d UED model from other theoretical scenarios.
Bertone Gianfranco
Jackson C. B.
Shaughnessy Gabe
Tait Tim M. P.
Vallinotto Alberto
No associations
LandOfFree
Gamma Ray Lines from a Universal Extra Dimension does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Gamma Ray Lines from a Universal Extra Dimension, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gamma Ray Lines from a Universal Extra Dimension will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-561841