1. Registration of atmospheric neutrinos with the BAIKAL Neutrino Telescope NT-96
- Author
-
V.A. Balkanov, I.A. Belolaptikov, L.B. Bezrukov, N.M. Budnev, A.G. Chensky, I.A. Danilchenko, Zh.-A.M. Djilkibaev, G.V. Domogatsky, A.A. Doroshenko, S.V. Fialkovsky, O.N. Gaponenko, A.A. Garus, T.I. Gress, A.M. Klabukov, A.I. Klimov, S.I. Klimushin, A.P. Koshechkin, V.F. Kulepov, L.A. Kuzmichev, V.E. Kuznetzov, J.J. Laudinskaite, S.V. Lovtzov, B.K. Lubsandorzhiev, M.B. Milenin, R.R. Mirgazov, N.I. Moseiko, V.A. Netikov, E.A. Osipova, A.I. Panfilov, Yu.V. Parfenov, A.A. Pavlov, E.N. Pliskovsky, P.G. Pokhil, E.G. Popova, M.I. Rozanov, V.Yu. Rubtzov, I.A. Sokalski, Ch. Spiering, O. Streicher, B.A. Tarashansky, T. Thon, R.V. Vasiljev, R. Wischnewski, and I.V. Yashin
- Subjects
Physics ,Muon ,Physics::Instrumentation and Detectors ,Astrophysics::High Energy Astrophysical Phenomena ,Monte Carlo method ,Neutrino telescope ,Flux ,Astronomy and Astrophysics ,Astrophysics ,law.invention ,Telescope ,law ,High Energy Physics::Experiment ,Underwater ,Neutrino ,Zenith - Abstract
We present first neutrino induced events observed with a deep underwater neutrino telescope. Data from 70 days effective life time of the BAIKAL prototype telescope NT-96 have been analyzed with two different methods. With the standard track reconstruction method, 9 clear upward muon candidates have been identified, in good agreement with 8.7 events expected from Monte Carlo calculations for atmospheric neutrinos. The second analysis is tailored to muons coming from close to the opposite zenith. It yields 4 events, compared to 3.5 from Monte Carlo expectations. From this we derive a 90 % upper flux limit of 1.1 * 10^-13 cm^-2 sec^-1 for muons in excess of those expected from atmospheric neutrinos with zenith angle > 150 degrees and energy > 10GeV.
- Published
- 1999