A search for neutrino signal from dark matter annihilation in the center of the Milky Way with Baikal NT200

A search for neutrino signal from dark matter annihilation in the center of the Milky Way with Baikal NT200

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 i...

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Veröffentlicht in:Astroparticle physics 2016-08, Vol.81, p.12-20
Hauptverfasser: Avrorin, A.D., Avrorin, A.V., Aynutdinov, V.M., Bannasch, R., Belolaptikov, I.A., Bogorodsky, D.Yu, Brudanin, V.B., Budnev, N.M., Danilchenko, I.A., Demidov, S.V., Domogatsky, G.V., Doroshenko, A.A., Dyachok, A.N., Dzhilkibaev, Zh.-A.M., Fialkovsky, S.V., Gafarov, A.R., Gaponenko, O.N., Golubkov, K.V., Gress, T.I., Honz, Z., Kebkal, K.G., Kebkal, O.G., Konischev, K.V., Korobchenko, A.V., Koshechkin, A.P., Koshel, F.K., Kozhin, A.V., Kulepov, V.F., Kuleshov, D.A., Ljashuk, V.I., Milenin, M.B., Mirgazov, R.A., Osipova, E.R., Panfilov, A.I., Pan’kov, L.V., Pliskovsky, E.N., Rozanov, M.I., Rjabov, E.V., Shaybonov, B.A., Sheifler, A.A., Shelepov, M.D., Skurihin, A.V., Smagina, A.A., Suvorova, O.V., Tabolenko, V.A., Tarashansky, B.A., Yakovlev, S.A., Zagorodnikov, A.V., Zhukov, V.A., Zurbanov, V.L.
Format: Artikel
Sprache:eng
Schlagworte:
Channels
Cross sections
Dark matter
Galactic Center
Milky Way Galaxy
Neutrino telescopes
Neutrinos
Origins
Searching
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Zusammenfassung: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 bb¯,W+W−,τ+τ−,μ+μ− or νν¯. 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.
ISSN:0927-6505
1873-2852
DOI:10.1016/j.astropartphys.2016.04.004