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An efficient hit finding algorithm for Baikal-GVD muon reconstruction

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arxiv 2108.00208 v1 pith:OR7CMANB submitted 2021-07-31 astro-ph.IM physics.data-an

V. A. Allakhverdyan , A. D. Avrorin , A. V. Avrorin , V. M. Aynutdinov , R. Bannasch , Z. Bardačová , I. A. Belolaptikov , I. V. Borina
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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 (for the Baikal-GVD Collaboration)
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classification astro-ph.IMphysics.data-an
keywords hitsmuonalgorithmsignalbaikalbaikal-gvdcherenkovnoise
verification ladder T0 review T1 audit T2 compute T3 formal
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The Baikal-GVD is a large scale neutrino telescope being constructed in Lake Baikal. The majority of signal detected by the telescope are noise hits, caused primarily by the luminescence of the Baikal water. Separating noise hits from the hits produced by Cherenkov light emitted from the muon track is a challenging part of the muon event reconstruction. We present an algorithm that utilizes a known directional hit causality criterion to contruct a graph of hits and then use a clique-based technique to select the subset of signal hits.The algorithm was tested on realistic detector Monte-Carlo simulation for a wide range of muon energies and has proved to select a pure sample of PMT hits from Cherenkov photons while retaining above 90\% of original signal.

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