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Estimate for GLAST LAT milky way Dark Matter WIMP line sensitivity
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2007 (English)In: First GLAST Symposium, American Institute of Physics (AIP), 2007, 514-515 p.Conference paper (Refereed)
Abstract [en]

The LAT Dark Matter and New Physics Working group has been developing approaches for the indirect astrophy sical detection of annihilation of dark matter. Our work has assumed that a significant component of dark matter is a new type of Weakly Interacting Massive Particle (WIMP). The annihilation of two WIMPs usually results in the production of many high energy gamma rays (>1 GeV) that can be well measured in the GLAST LAT if present. There is also the possibility to observe γ lines from annihilation into γγ and or γZ final states. In popular SUSY theories these line decays occur at the 10-4 to 10-2 branching fraction level. Estimates of LAT sensitivity (at 5σ above background) and upper limits (upper limit at the 95% confidence level) to these WIMP lines will be presented. These sensitivities are given in photons/cm2/sec/sr and so do not depend on the WIMP models. However, they do depend on the diffuse background model. The latter is derived from GALPROP [1] based on EGRET and other data in the EGRET energy range. We use extrapolations, provided by the GALPROP team to the higher energy range of 150 GeV explored in the preliminary line sensitivity study presented here. Comparison with theory depends upon the WIMP model (e.g., line energy and 1 or 2 lines), the DM halo model, and other astrophysics backgrounds. Thus estimates of the ability of the LAT to actually observe WIMP lines can vary over orders of magnitude depending upon which models are chosen.

Place, publisher, year, edition, pages
American Institute of Physics (AIP), 2007. 514-515 p.
, AIP Conference Proceedings, ISSN 0094-243X ; 921
Keyword [en]
Dark Matter, Gamma rays, GLAST, WIMP
National Category
Physical Sciences
URN: urn:nbn:se:kth:diva-154917DOI: 10.1063/1.2757428ISI: 000248569700174ScopusID: 2-s2.0-78649795215ISBN: 978-073540431-1OAI: diva2:759236
1st Gamma-ray Large Area Space Telescope Symposium, GLAST, 5 February 2007 through 8 February 2007, Stanford, CA, United States

QC 20141029

Available from: 2014-10-29 Created: 2014-10-29 Last updated: 2014-10-29Bibliographically approved

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Conrad, Jan
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Particle and Astroparticle Physics
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