Registration of atmospheric neutrinos with the BAIKAL neutrino telescope NT-96

Authors
Balkanov, VA Belolaptikov, IA Bezrukov, LB Budnev, NM Chensky, AG Danilchenko, IA Djilkibaev, ZAM Domogatsky, GV Doroshenko, AA Fialkovsky, SV Gaponenko, ON Garus, AA Gress, TI Klabukov, AM Klimov, AI Klimushin, SI Koshechkin, AP Kulepov, VF Kuzmichev, LA Kuznetzov, VE Laudinskaite, JJ Lovtzov, SV Lubsandorzhiev, BK Milenin, MB Mirgazov, RR Moseiko, NI Netikov, VA Osipova, EA Panfilov, AI Parfenov, YV Pavlov, AA Pliskovsky, EN Pokhil, PG Popova, EG Rozanov, MI Rubtzov, VY Sokalski, IA Spiering, C Streicher, O Tarashansky, BA Thon, T Vasiljev, RV Wischnewski, R Yashin, IV
Citation
Va. Balkanov et al., Registration of atmospheric neutrinos with the BAIKAL neutrino telescope NT-96, ASTROPART P, 12(1-2), 1999, pp. 75-86
Citations number
17
Categorie Soggetti
Space Sciences
Journal title
ASTROPARTICLE PHYSICS
ISSN journal
09276505 → ACNP
Volume
12
Issue
1-2
Year of publication
1999
Pages
75 - 86
Database
ISI
SICI code
0927-6505(199910)12:1-2<75:ROANWT>2.0.ZU;2-N
Abstract
We present the first neutrino induced events observed with a deep underwate r neutrino telescope. Data from 70 days effective life time of the BAIKAL p rototype telescope NT-96 have been analyzed with two different methods. Wit h 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 tailo red 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% up per flux limit of 1.1.10(-13) cm(-2) sec(-1) for muons in excess of those e xpected from atmospheric neutrinos with zenith angle > 150 degrees and ener gy > 10 GeV. (C) 1999 Elsevier Science B.V. All rights reserved.