IBS Publications Repository: An optimal energy estimator to reduce correlated noise for the EXO-200 light readout

An optimal energy estimator to reduce correlated noise for the EXO-200 light readout

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Title: An optimal energy estimator to reduce correlated noise for the EXO-200 light readout

Author(s): Davis, CG; Hall, C; Albert, JB; Barbeau, PS; Beck, D; Belov, V; Breidenbach, M; Brunner, T; Burenkov, A; Cao, GF; Cen, WR; Chambers, C; Cleveland, B; Coon, M; Craycraft, A; Daniels, T; Danilov, M; Daugherty, SJ; Davis, J; Delaquis, S; Der Mesrobian-Kabakian, A; DeVoe, R; Didberidze, T; Dilling, J; Dolgolenko, A; Dolinski, MJ; Dunford, M; Fairbank, W; Farine, J; Feldmeier, W; Feyzbakhsh, S; Fierlinger, P; Fudenberg, D; Gornea, R; Graham, K; Gratta, G; Hughes, M; Jewell, MJ; Johnson, A; Johnson, TN; Johnston, S; Karelin, A; Kaufman, LJ; Killick, R; Koffas, T; Kravitz, S; Krucken, R; Kuchenkov, A; Kumar, KS; D.S. Leonard; Licciardi, C; Lin, YH; Ling, J; MacLellan, R; Marino, MG; Mong, B; Moore, D; Njoya, O; Nelson, R; Odian, A; Ostrovskiy, I; Piepke, A; Pocar, A; Prescott, CY; Retiere, F; Rowson, PC; Russell, JJ; Schubert, A; Sinclair, D; Smith, E; Stekhanov, V; Tarka, M; Tolba, T; Tsang, R; Twelker, K; Vuilleumier, JL; Waite, A; Walton, J; Walton, T; Weber, M; Wen, LJ; Wichoski, U; Wood, J; Yang, L; Yen, YR; Zeldovich, OY

Subject: Analysis and statistical methods, ; Data processing methods, ; Double-beta decay detectors, ; Noble liquid detectors (scintillation, ionization, double-phase)

Abstract: The energy resolution of the EXO-200 detector is limited by electronics noise in the measurement of the scintillation response. Here we present a new technique to extract optimal scintillation energy measurements for signals split across multiple channels in the presence of correlated noise. The implementation of these techniques improves the energy resolution of the detector at the neutrinoless double beta decay Q-value from [1.9641 +/- 0.0039]% to [1.5820 +/- 0.0044]%. (c) 2016 IOP Publishing Ltd and Sissa Medialab srl