Search for a diffuse flux of high-energy extraterrestrial neutrinos with the NT200 neutrino telescope

• Published in: Astroparticle physics Vol. 25; no. 2; pp. 140 - 150
• Main Authors: Aynutdinov, V., Balkanov, V., Belolaptikov, I., Bezrukov, L., Borschov, D., Budnev, N., Chensky, A., Danilchenko, I., Davidov, Ya, Domogatsky, G., Doroshenko, A., Dyachok, A., Dzhilkibaev, Zh.-A., Fialkovsky, S., Gaponenko, O., Gress, O., Gress, T., Grishin, O., Klabukov, A., Klimov, A., Klimushin, S., Konischev, K., Koshechkin, A., Kuzmichev, L., Kulepov, V., Lubsandorzhiev, B., Mikheyev, S., Mikolajski, T., Milenin, M., Mirgazov, R., Osipova, E., Pavlov, A., Pan’kov, G., Pan’kov, L., Panfilov, A., Parfenov, Yu, Petukhov, D., Pliskovsky, E., Pokhil, P., Poleschuk, V., Popova, E., Prosin, V., Rozanov, M., Rubtzov, V., Semeney, Yu, Shaibonov, B., Shirokov, A., Spiering, Ch, Tarashansky, B., Vasiliev, R., Vyatchin, E., Wischnewski, R., Yashin, I., Zhukov, V.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.03.2006
• Subjects: BAIKAL; Diffusion; Extraterrestrial environments; Flux; Fluxes; Neutrino astronomy; Neutrino telescopes; Neutrinos; Searching; Strontium; UHE neutrinos; Neutrino telescopes; 96.40.Tv; Neutrino astronomy; BAIKAL; 95.85.Ry; UHE neutrinos; 95.55.Vj
• ISSN: 0927-6505; 1873-2852
• DOI: 10.1016/j.astropartphys.2005.12.005

We present the results of a search for high-energy extraterrestrial neutrinos with the Baikal underwater Cherenkov detector NT200, based on data taken in 1998–2003. Upper limits on the diffuse fluxes of ν e + ν μ + ν τ , predicted by several models of AGN-like neutrino sources, are derived. For an E −2 behavior of the neutrino spectrum, our limit is E 2 Φ ν ( E) < 8.1 × 10 −7 cm −2 s −1 sr −1 GeV over an neutrino energy range 2 × 10 4–5 × 10 7 GeV. The upper limit on the resonant ν ¯ e diffuse flux is Φ ν ¯ e < 3.3 × 10 - 20 cm - 2 s - 1 sr - 1 GeV - 1 .