Search for Neutrinoless Double- β Decay with the Complete EXO-200 Dataset

Anton G, Badhrees I, Barbeau PS, Beck D, Belov V, Bhatta T, Breidenbach M, Brunner T, Cao GF, Cen WR, Chambers C, Cleveland B, Coon M, Craycraft A, Daniels T, Danilov M, Darroch L, Daugherty SJ, Davis J, Delaquis S, Der Mesrobian-Kabakian A, Devoe R, Dilling J, Dolgolenko A, Dolinski MJ, Echevers J, Fairbank W, Fairbank D, Farine J, Feyzbakhsh S, Fierlinger P, Fudenberg D, Gautam P, Gornea R, Gratta G, Hall C, Hansen EV, Hößl J, Hufschmidt P, Hughes M, Iverson A, Jamil A, Jessiman C, Jewell MJ, Johnson A, Karelin A, Kaufman LJ, Koffas T, Krücken R, Kuchenkov A, Kumar KS, Lan Y, Larson A, Lenardo BG, Leonard DS, Li GS, Li S, Li Z, Licciardi C, Lin YH, MacLellan R, McElroy T, Michel T, Mong B, Moore DC, Murray K, Njoya O, Nusair O, Odian A, Ostrovskiy I, Piepke A, Pocar A, Retière F, Robinson AL, Rowson PC, Ruddell D, Runge J, Schmidt S, Sinclair D, Soma AK, Stekhanov V, Tarka M, Todd J, Tolba T, Totev TI, Veenstra B, Veeraraghavan V, Vogel P, Vuilleumier JL, Wagenpfeil M, Watkins J, Weber M, Wen LJ, Wichoski U, Wrede G, Wu SX, Xia Q, Yahne DR, Yang L, Yen YR, Zeldovich OY, Ziegler T (2019)

Publication Type: Journal article

Publication year: 2019

Journal

Book Volume: 123

Article Number: 161802

Journal Issue: 16

DOI: 10.1103/PhysRevLett.123.161802

Abstract

A search for neutrinoless double-β decay (0νββ) in Xe136 is performed with the full EXO-200 dataset using a deep neural network to discriminate between 0νββ and background events. Relative to previous analyses, the signal detection efficiency has been raised from 80.8% to 96.4±3.0%, and the energy resolution of the detector at the Q value of Xe136 0νββ has been improved from σ/E=1.23% to 1.15±0.02% with the upgraded detector. Accounting for the new data, the median 90% confidence level 0νββ half-life sensitivity for this analysis is 5.0×1025 yr with a total Xe136 exposure of 234.1 kg yr. No statistically significant evidence for 0νββ is observed, leading to a lower limit on the 0νββ half-life of 3.5×1025 yr at the 90% confidence level.

Authors with CRIS profile

Involved external institutions

University of Illinois at Urbana-Champaign United States (USA) (US) Triangle Universities Nuclear Laboratory United States (USA) (US) Institute of High Energy Physics (IHEP) / 中国科学院高能物理研究所 China (CN) Colorado State University United States (USA) (US) McGill University Canada (CA) National Research Centre "Kurchatov Institute" / Hациональный исследовательский центр "Курчатовский Институт" Russian Federation (RU) Yale University United States (USA) (US) Triumf Canada (CA) Indiana University United States (USA) (US) Stanford National Accelerator Laboratory (SLAC) United States (USA) (US) Carleton University Canada (CA) University of Maryland United States (USA) (US) Drexel University United States (USA) (US) The University of Alabama United States (USA) (US) Stanford University United States (USA) (US) Technische Universität München (TUM) Germany (DE) State University of New York at Albany (UNY Albany / UAlbany) United States (USA) (US) University of North Carolina Wilmington (UNCW) United States (USA) (US) University of South Dakota United States (USA) (US) Laurentian University Canada (CA) California Institute of Technology (Caltech) United States (USA) (US) Universität Bern Switzerland (CH) University of Massachusetts Amherst (UMass) United States (USA) (US) Institute for Basic Science Korea, Republic of (KR)

How to cite

APA:

Anton, G., Badhrees, I., Barbeau, P.S., Beck, D., Belov, V., Bhatta, T.,... Ziegler, T. (2019). Search for Neutrinoless Double- β Decay with the Complete EXO-200 Dataset. Physical Review Letters, 123(16). https://doi.org/10.1103/PhysRevLett.123.161802

MLA:

Anton, Gisela, et al. "Search for Neutrinoless Double- β Decay with the Complete EXO-200 Dataset." Physical Review Letters 123.16 (2019).

BibTeX: Download