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1. Observations of track-like neutrino events with Baikal-GVD

Author

Dmitry Zaborov, V.A. Allakhverdyan, A.D. Avrorin, A.V. Avrorin, V.M. Aynutdinov, R. Bannasch, Zuzana Bardačová, I.A. Belolaptikov, I.V. Borina, V.B. Brudanin, N.M. Budnev, V.Y. Dik, G.V. Domogatsky, A.A. Doroshenko, Rastislav Dvornicky, A.N. Dyachok, Zh.-A.M. Dzhilkibaev, Eliška Eckerová, T.V. Elzhov, L. Fajt, Stanislav Vasilevich Fialkovsky, A.R. Gafarov, K.V. Golubkov, N.S. Gorshkov, T.I. Gress, M.S. Katulin, K.G. Kebkal, O.G. Kebkal, E.V. Khramov, M.M. Kolbin, K.V. Konischev, K.A. Kopański, A.V. Korobchenko, A.P. Koshechkin, V.A. Kozhin, M.V. Kruglov, M.K. Kryukov, V.F. Kulepov, Pa. Malecki, Y.M. Malyshkin, M.B. Milenin, R.R. Mirgazov, D.V. Naumov, V. Nazari, W. Noga, D.P. Petukhov, E.N. Pliskovsky, M.I. Rozanov, V.D. Rushay, E.V. Ryabov, G.B. Safronov, B.A. Shaybonov, M.D. Shelepov, Fedor Šimkovic, A.E. Sirenko, A.V. Skurikhin, A.G. Solovjev, M.N. Sorokovikov, Ivan Štekl, A.P. Stromakov, E.O. Sushenok, O.V. Suvorova, V.A. Tabolenko, B.A. Tarashansky, Y.V. Yablokova, and S.A. Yakovlev

Subjects
High Energy Astrophysical Phenomena (astro-ph.HE), Physics, Muon, Physics::Instrumentation and Detectors, Track (disk drive), Astrophysics::High Energy Astrophysical Phenomena, Detector, Monte Carlo method, FOS: Physical sciences, Flux, Reconstruction algorithm, Nuclear physics, Neutrino detector, High Energy Physics::Experiment, Neutrino, Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Instrumentation and Methods for Astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM)
Abstract

The Baikal Gigaton Volume Detector (Baikal-GVD) is a km$^3$-scale neutrino detector currently under construction in Lake Baikal, Russia. The detector currently consists of 2304 optical modules arranged on 64 vertical strings. Further extension of the array is planned for March 2022. The data from the partially complete array have been analyzed using a $\chi^2$-based track reconstruction algorithm. After suppression of the downward-going atmospheric muon background, a flux of upward-going neutrino events is observed, dominated by the atmospheric neutrinos. The observed flux is in good agreement with Monte Carlo predictions., Comment: 8 pages, 5 figures, to be published in Proceedings of the 37th International Cosmic Ray Conference (ICRC-2021), 12-23 July 2021

Published
2021

2. Performance of the muon track reconstruction with the Baikal-GVD neutrino telescope

Author

Grigory Safronov, V.A. Allakhverdyan, A.D. Avrorin, A.V. Avrorin, V.M. Aynutdinov, R. Bannasch, Zuzana Bardačová, I.A. Belolaptikov, V.B. Brudanin, N.M. Budnev, V.Y. Dik, G.V. Domogatsky, A.A. Doroshenko, Rastislav Dvornicky, A.N. Dyachok, Zh.-A.M. Dzhilkibaev, Eliška Eckerová, T.V. Elzhov, L. Fajt, Stanislav Vasilevich Fialkovsky, A.R. Gafarov, K.V. Golubkov, N.S. Gorshkov, T.I. Gress, M.S. Katulin, K.G. Kebkal, O.G. Kebkal, E.V. Khramov, M.M. Kolbin, K.V. Konischev, K.A. Kopański, A.V. Korobchenko, A.P. Koshechkin, V.A. Kozhin, M.V. Kruglov, M.K. Kryukov, V.F. Kulepov, Pa. Malecki, Y.M. Malyshkin, M.B. Milenin, R.R. Mirgazov, D.V. Naumov, V. Nazari, W. Noga, D.P. Petukhov, E.N. Pliskovsky, M.I. Rozanov, V.D. Rushay, E.V. Ryabov, B.A. Shaybonov, M.D. Shelepov, Fedor Šimkovic, A.E. Sirenko, A.V. Skurikhin, A.G. Solovjev, M.N. Sorokovikov, Ivan Štekl, A.P. Stromakov, E.O. Sushenok, O.V. Suvorova, V.A. Tabolenko, B.A. Tarashansky, Y.V. Yablokova, S.A. Yakovlev, and D.N. Zaborov

Subjects
High Energy Astrophysical Phenomena (astro-ph.HE), Physics, Particle physics, Muon, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Track (disk drive), Monte Carlo method, Detector, Astrophysics::Instrumentation and Methods for Astrophysics, FOS: Physical sciences, Classifier (linguistics), High Energy Physics::Experiment, Gradient boosting, Neutrino, Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Instrumentation and Methods for Astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM), Selection (genetic algorithm)
Abstract

Baikal-GVD is a km$^3$-scale neutrino telescope being constructed in Lake Baikal. Muon and partially tau (anti)neutrino interactions near the detector through the W$^{\pm}$-boson exchange are accompanied by muon tracks. Reconstructed direction of the track is arguably the most precise probe of the neutrino direction attainable in Cerenkov neutrino telescopes. Muon reconstruction techniques adopted by Baikal-GVD are discussed in the present report. Performance of the muon reconstruction is studied using realistic Monte Carlo simulation of the detector. The algorithms are applied to real data from Baikal-GVD and the results are compared with simulations. The performance of the neutrino selection based on a boosted decision tree classifier is discussed., 8 pages, 5 figures. Poster presented at 37th International Cosmic Ray Conference (ICRC 2021), July 12th - 23rd, 2021, Online - Berlin, Germany. PoS(ICRC2021)1080

Published
2021
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