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Title: Optimal angular window for observing dark matter annihilation from the Galactic Center region : the case of gamma-ray lines.

Abstract

Although the emission of radiation from dark matter annihilation is expected to be maximized at the Galactic Center, geometric factors and the presence of point-like and diffuse backgrounds make the choice of the angular window size to optimize the chance of a signal detection a non-trivial problem. We find that the best strategy is to focus on an annulus around the Galactic Center of {approx} 1{sup o} to {approx}> 30{sup o}, where the optimal size depends on the angular distribution of the signal and the backgrounds. Although our conclusions are general, we illustrate this point in the particular case of annihilation into two monochromatic photons in the phenomenologically most interesting range of energy 45 GeV {approx}< E {approx}< 80 GeV, which is of great interest for the GLAST satellite. We find for example that dark matter models with sufficiently strong line annihilation signals, like the Inert Doublet Model, may be detectable without or with reasonable boost factors.

Authors:
; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
935944
Report Number(s):
ANL-HEP-PR-08-16
TRN: US0804779
DOE Contract Number:  
DE-AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
Astroparticle Phys.
Additional Journal Information:
Journal Volume: 29; Journal Issue: 2008
Country of Publication:
United States
Language:
ENGLISH
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ANGULAR DISTRIBUTION; ANNIHILATION; DETECTION; NONLUMINOUS MATTER; PHOTONS; RADIATIONS; WINDOWS

Citation Formats

Serpico, P D, Zaharijas, G, High Energy Physics, and FNL,. Optimal angular window for observing dark matter annihilation from the Galactic Center region : the case of gamma-ray lines.. United States: N. p., 2008. Web. doi:10.1016/j.astropartphys.2008.04.001.
Serpico, P D, Zaharijas, G, High Energy Physics, & FNL,. Optimal angular window for observing dark matter annihilation from the Galactic Center region : the case of gamma-ray lines.. United States. https://doi.org/10.1016/j.astropartphys.2008.04.001
Serpico, P D, Zaharijas, G, High Energy Physics, and FNL,. Tue . "Optimal angular window for observing dark matter annihilation from the Galactic Center region : the case of gamma-ray lines.". United States. https://doi.org/10.1016/j.astropartphys.2008.04.001.
@article{osti_935944,
title = {Optimal angular window for observing dark matter annihilation from the Galactic Center region : the case of gamma-ray lines.},
author = {Serpico, P D and Zaharijas, G and High Energy Physics and FNL,},
abstractNote = {Although the emission of radiation from dark matter annihilation is expected to be maximized at the Galactic Center, geometric factors and the presence of point-like and diffuse backgrounds make the choice of the angular window size to optimize the chance of a signal detection a non-trivial problem. We find that the best strategy is to focus on an annulus around the Galactic Center of {approx} 1{sup o} to {approx}> 30{sup o}, where the optimal size depends on the angular distribution of the signal and the backgrounds. Although our conclusions are general, we illustrate this point in the particular case of annihilation into two monochromatic photons in the phenomenologically most interesting range of energy 45 GeV {approx}< E {approx}< 80 GeV, which is of great interest for the GLAST satellite. We find for example that dark matter models with sufficiently strong line annihilation signals, like the Inert Doublet Model, may be detectable without or with reasonable boost factors.},
doi = {10.1016/j.astropartphys.2008.04.001},
url = {https://www.osti.gov/biblio/935944}, journal = {Astroparticle Phys.},
number = 2008,
volume = 29,
place = {United States},
year = {2008},
month = {1}
}