Liquid argon light collection and veto modeling in GERDA Phase II
Creators: name: GERDA Collaboration
name: Agostini, M.
name: Alexander, A.
name: Araujo, G. R.
name: Bakalyarov, A. M.
name: Balata, M.
name: Barabanov, I.
name: Baudis, L.
name: Bauer, C.
name: Belogurov, S.
name: Bettini, A.
name: Bezrukov, L.
name: Biancacci, V.
name: Bossio, E.
name: Bothe, V.
name: Brugnera, R.
name: Caldwell, A.
name: Calgaro, S.
name: Cattadori, C.
name: Chernogorov, A.
name: Chiu, P-J.
name: Comellato, T.
name: D'Andrea, V.
name: Demidova, E. V.
name: Di Giacinto, A.
name: Di Marco, N.
name: Doroshkevich, E.
name: Fischer, F.
name: Fomina, M.
name: Gangapshev, A.
name: Garfagnini, A.
name: Gooch, C.
name: Grabmayr, P.
name: Gurentsov, V.
name: Gusev, K.
name: Hakenmüller, J.
name: Hemmer, S.
name: Hofmann, W.
name: Hult, M.
name: Inzhechik, L. V.
name: Csáthy, J. Janicskó
name: Jochum, J.
name: Junker, M.
name: Kazalov, V.
name: Kermaïdic, Y.
name: Khushbakht, H.
name: Kihm, T.
name: Kilgus, K.
name: Kirpichnikov, I. V.
name: Klimenko, A.
name: Knöpfle, K. T.
name: Kochetov, O.
name: Kornoukhov, V. N.
name: Krause, P.
name: Kuzminov, V. V.
name: Laubenstein, M.
name: Lehnert, B.
name: Lindner, M.
name: Lippi, I.
name: Lubashevskiy, A.
name: Lubsandorzhiev, B.
name: Lutter, G.
name: Macolino, C.
name: Majorovits, B.
name: Maneschg, W.
name: Manzanillas, L.
name: Marshall, G.
name: Marshall, G.
name: Miloradovic, M.
name: Mingazheva, R.
name: Misiaszek, M.
name: Morella, M.
name: Müller, Y.
name: Nemchenok, I.
name: Neuberger, M.
name: Pandola, L.
name: Pelczar, K.
name: Pertoldi, L.
name: Piseri, P.
name: Pullia, A.
name: Rauscher, L.
name: Redchuk, M.
name: Riboldi, S.
name: Rumyantseva, N.
name: Sada, C.
name: Sailer, S.
name: Salamida, F.
name: Schönert, S.
name: Schreiner, J.
name: Schütt, M.
name: Schütz, A-K.
name: Schulz, O.
name: Schwarz, M.
name: Schwingenheuer, B.
name: Selivanenko, O.
name: Shevchik, E.
name: Shirchenko, M.
name: Shtembari, L.
name: Simgen, H.
name: Smolnikov, A.
name: Stukov, D.
name: Sullivan, S.
name: Vasenko, A. A.
name: Veresnikova, A.
name: Vignoli, C.
name: von Sturm, K.
name: Wegmann, A.
name: Wester, T.
name: Wiesinger, C.
name: Wojcik, M.
name: Yanovich, E.
name: Zatschler, B.
name: Zhitnikov, I.
name: Zhukov, S. V.
name: Zinatulina, D.
name: Zschocke, A.
name: Zsigmond, A. J.
name: Zuber, K.
name: Zuzel, G.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: The ability to detect liquid argon scintillation light from within a densely packed high-purity germanium detector array allowed the GERDA experiment to reach an exceptionally low background rate in the search for neutrinoless double beta decay of $^{76}$Ge. Proper modeling of the light propagation throughout the experimental setup, from any origin in the liquid argon volume to its eventual detection by the novel light read-out system, provides insight into the rejection capability and is a necessary ingredient to obtain robust background predictions. In this paper, we present a model of the GERDA liquid argon veto, as obtained by Monte Carlo simulations and constrained by calibration data, and highlight its application for background decomposition.