期刊
ASTROPARTICLE PHYSICS
卷 81, 期 -, 页码 12-20出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.astropartphys.2016.04.004
关键词
Dark matter; Galactic Center; Neutrino telescopes
资金
- RSCF Grant [14-12-01430]
- Russian Science Foundation [14-12-01430] Funding Source: Russian Science Foundation
We reanalyze the dataset collected during the years 1998-2003 by the deep underwater neutrino telescope NT200 in the lake Baikal with the low energy threshold (10 GeV) in searches for neutrino signal from dark matter annihilations near the center of the Milky Way. Two different approaches are used in the present analysis: counting events in the cones around the direction towards the Galactic Center and the maximum likelihood method. We assume that the dark matter particles annihilate dominantly over one of the annihilation channels b (b) over bar, W+W-, tau(+)tau(-), mu(+)mu(-) or nu(nu) over bar. No significant excess of events towards the Galactic Center over expected neutrino background of atmospheric origin is found and we derive 90% CL upper limits on the annihilation cross section of dark matter. (C) 2016 Elsevier B.V. All rights reserved.
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