Measuring muon tracks in Baikal-GVD using a fast reconstruction algorithm

V. A. Allakhverdyan; A. D. Avrorin; A. V. Avrorin; V. M. Aynutdinov; R. Bannasch; Z. Bardačová; I. A. Belolaptikov; I. V. Borina; V. B. Brudanin; N. M. Budnev; V. Y. Dik; G. V. Domogatsky; A. A. Doroshenko; R. Dvornický; A. N. Dyachok; Zh.-A. M. Dzhilkibaev; E. Eckerová; T. V. Elzhov; L. Fajt; S. V. Fialkovski; 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; F. Šimkovic; A. E. Sirenko; A. V. Skurikhin; A. G. Solovjev; M. N. Sorokovikov; I. Štekl; A. P. Stromakov; E. O. Sushenok; O. V. Suvorova; V. A. Tabolenko; B. A. Tarashansky; Y. V. Yablokova; S. A. Yakovlev; D. N. Zaborov

doi:10.1140/epjc/s10052-021-09825-y

2021 Impact factor 4.991

Particles and Fields

Open Access

Eur. Phys. J. C (2021) 81: 1025
https://doi.org/10.1140/epjc/s10052-021-09825-y

Regular Article - Experimental Physics

Measuring muon tracks in Baikal-GVD using a fast reconstruction algorithm

V. A. Allakhverdyan¹, A. D. Avrorin², A. V. Avrorin², V. M. Aynutdinov², R. Bannasch³, Z. Bardačová⁴, I. A. Belolaptikov¹, I. V. Borina¹, V. B. Brudanin¹, N. M. Budnev⁵, V. Y. Dik¹, G. V. Domogatsky², A. A. Doroshenko², R. Dvornický¹^,4, A. N. Dyachok⁵, Zh.-A. M. Dzhilkibaev², E. Eckerová⁴, T. V. Elzhov¹, L. Fajt⁶, S. V. Fialkovski⁷, A. R. Gafarov⁵, K. V. Golubkov², N. S. Gorshkov¹, T. I. Gress⁵, M. S. Katulin¹, K. G. Kebkal³, O. G. Kebkal³, E. V. Khramov¹, M. M. Kolbin¹, K. V. Konischev¹, K. A. Kopański⁸, A. V. Korobchenko¹, A. P. Koshechkin², V. A. Kozhin⁹, M. V. Kruglov¹, M. K. Kryukov², V. F. Kulepov⁷, Pa. Malecki⁸, Y. M. Malyshkin¹, M. B. Milenin², R. R. Mirgazov⁵, D. V. Naumov¹, V. Nazari¹, W. Noga⁸, D. P. Petukhov², E. N. Pliskovsky¹, M. I. Rozanov¹⁰, V. D. Rushay¹, E. V. Ryabov⁵, G. B. Safronov², B. A. Shaybonov¹, M. D. Shelepov², F. Šimkovic¹^,4^,6, A. E. Sirenko¹, A. V. Skurikhin⁹, A. G. Solovjev¹, M. N. Sorokovikov¹, I. Štekl⁶, A. P. Stromakov², E. O. Sushenok¹, O. V. Suvorova², V. A. Tabolenko⁵, B. A. Tarashansky⁵, Y. V. Yablokova¹, S. A. Yakovlev³ and D. N. Zaborov²^bw

¹ Joint Institute for Nuclear Research, Dubna, Russia
² Institute for Nuclear Research, Russian Academy of Sciences, Moscow, Russia
³ EvoLogics GmbH, Berlin, Germany
⁴ Comenius University, Bratislava, Slovakia
⁵ Irkutsk State University, Irkutsk, Russia
⁶ Czech Technical University in Prague, Prague, Czech Republic
⁷ Nizhny Novgorod State Technical University, Nizhny Novgorod, Russia
⁸ Institute of Nuclear Physics of Polish Academy of Sciences (IFJ PAN), Kraków, Poland
⁹ Skobeltsyn Institute of Nuclear Physics, Moscow State University, Moscow, Russia
¹⁰ St. Petersburg State Marine Technical University, St. Petersburg, Russia

^bw zaborov@inr.ru

Received: 15 June 2021
Accepted: 13 November 2021
Published online: 24 November 2021

Abstract

The Baikal Gigaton Volume Detector (Baikal-GVD) is a km-scale neutrino detector currently under construction in Lake Baikal, Russia. The detector consists of several thousand optical sensors arranged on vertical strings, with 36 sensors per string. The strings are grouped into clusters of 8 strings each. Each cluster can operate as a stand-alone neutrino detector. The detector layout is optimized for the measurement of astrophysical neutrinos with energies of 100 TeV and above. Events resulting from charged current interactions of muon (anti-)neutrinos will have a track-like topology in Baikal-GVD. A fast -based reconstruction algorithm has been developed to reconstruct such track-like events. The algorithm has been applied to data collected in 2019 from the first five operational clusters of Baikal-GVD, resulting in observations of both downgoing atmospheric muons and upgoing atmospheric neutrinos. This serves as an important milestone towards experimental validation of the Baikal-GVD design. The analysis is limited to single-cluster data, favoring nearly-vertical tracks.

© The Author(s) 2021

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