Search for two-neutrino double-beta decay of 136Xe to the $0$$^{+}_{1}$ excited state of 136Ba with the complete EXO-200 dataset

EXO-200 Collaboration; S. Al Kharusi; G. Anton; I. Badhrees; P. S. Barbeau; D. Beck; V. Belov; T. Bhatta; M. Breidenbach; T. Brunner; G. F. Cao; W. R. Cen; C. Chambers; B. Cleveland; M. Coon; A. Craycraft; T. Daniels; L. Darroch; S. J. Daugherty; J. Davis; S. Delaquis; A. Der Mesrobian-Kabakian; R. DeVoe; J. Dilling; A. Dolgolenko; M. J. Dolinski; J. Echevers; W. Fairbank Jr.; D. Fairbank; J. Farine; S. Feyzbakhsh; P. Fierlinger; Y. S. Fu; D. Fudenberg; P. Gautam; R. Gornea; G. Gratta; C. Hall; E. V. Hansen; J. Hoessl; P. Hufschmidt; M. Hughes; A. Iverson; A. Jamil; C. Jessiman; M. J. Jewell; A. Johnson; A. Karelin; L. J. Kaufman; T. Koffas; R. Krücken; A. Kuchenkov; K. S. Kumar; Y. Lan; A. Larson; B. G. Lenardo; D. S. Leonard; G. S. Li; S. Li; Z. Li; C. Licciardi; Y. H. Lin; R. MacLellan; T. McElroy; T. Michel; B. Mong; D. C. Moore; K. Murray; O. Njoya; O. Nusair; A. Odian; I. Ostrovskiy; A. Perna; A. Piepke; A. Pocar; F. Retière; A. L. Robinson; P. C. Rowson; J. Runge; S. Schmidt; D. Sinclair; K. Skarpaas; A. K. Soma; V. Stekhanov; M. Tarka; S. Thibado; J. Todd; T. Tolba; T. I. Totev; R. Tsang; B. Veenstra; V. Veeraraghavan; P. Vogel; J. -L. Vuilleumier; M. Wagenpfeil; J. Watkins; M. Weber; L. J. Wen; U. Wichoski; G. Wrede; S. X. Wu; Q. Xia; D. R. Yahne; L. Yang; Y. -R. Yen; O. Ya Zeldovich; T. Ziegler

doi:10.1088/1674-1137/aceee3

$Search for two-neutrino double-beta decay of 136Xe to the $0$$^{+}_{1}$ excited state of 136Ba with the complete EXO-200 dataset$

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Search for two-neutrino double-beta decay of 136Xe to the $0$$^{+}_{1}$ excited state of 136Ba with the complete EXO-200 dataset

EXO-200 Collaboration, S. Al Kharusi, G. Anton, I. Badhrees, P. S. Barbeau, D. Beck, V. Belov, T. Bhatta, M. Breidenbach, T. Brunner, …

Chinese physics C, v 47(10), 103001

11 Aug 2023

DOI: https://doi.org/10.1088/1674-1137/aceee3

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Abstract

excited state

EXO-200 experiment

neutrinoless double beta decay

PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

A new search for two-neutrino double-beta (2νββ) decay of 136Xe to the $0_1^ + $ excited state of 136Ba is performed with the full EXO-200 dataset. A deep learning-based convolutional neural network is used to discriminate signal from background events. Signal detection efficiency is increased relative to previous searches by EXO-200 by more than a factor of two. With the addition of the Phase II dataset taken with an upgraded detector, the median 90% confidence level half-life sensitivity of 2νββ decay to the $0_1^ + $ state of 136Ba is $ 2.9 \times 10^{24} $ yr using a total 136Xe exposure of 234.1 kg yr. Furthermore, no statistically significant evidence for 2νββ decay to the $0_1^ + $ state is observed, leading to a lower limit of $ T^{2\nu}_{1/2}(0^+ \rightarrow 0^+_1) \gt 1.4\times10^{24} $ yr at 90% confidence level, improved by 70% relative to the current world's best constraint.

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Title: Search for two-neutrino double-beta decay of 136Xe to the $0$$^{+}_{1}$ excited state of 136Ba with the complete EXO-200 dataset
Creators: EXO-200 Collaboration (Collaboration)
S. Al Kharusi - McGill University
G. Anton
I. Badhrees - Carleton University
P. S. Barbeau - Triangle Universities Nuclear Laboratory
D. Beck - University of Illinois Urbana-Champaign
V. Belov - Kurchatov Institute
T. Bhatta - University of South Dakota
M. Breidenbach - SLAC National Accelerator Laboratory
T. Brunner - McGill University
G. F. Cao - Institute of High Energy Physics
W. R. Cen - Institute of High Energy Physics
C. Chambers - McGill University
B. Cleveland - Drexel University, Microbiology and Immunology
M. Coon - University of Illinois Urbana-Champaign
A. Craycraft - Colorado State University
T. Daniels - University of North Carolina Wilmington
L. Darroch - Institute of Microelectronics
S. J. Daugherty - Indiana University Bloomington
J. Davis
S. Delaquis - SLAC National Accelerator Laboratory
A. Der Mesrobian-Kabakian
R. DeVoe - Stanford University
J. Dilling - TRIUMF
A. Dolgolenko - Kurchatov Institute
M. J. Dolinski - Drexel University, Physics
J. Echevers - University of Illinois Urbana-Champaign
W. Fairbank Jr.
D. Fairbank - Colorado State University
J. Farine - Laurentian University
S. Feyzbakhsh - University of Massachusetts Amherst
P. Fierlinger - Excellence Cluster Universe
Y. S. Fu - Institute of High Energy Physics
D. Fudenberg - Stanford University
P. Gautam
R. Gornea - Carleton University
G. Gratta - Stanford University
C. Hall - University of Maryland, College Park
E. V. Hansen - Drexel University
J. Hoessl - Friedrich-Alexander-Universität Erlangen-Nürnberg
P. Hufschmidt - Friedrich-Alexander-Universität Erlangen-Nürnberg
M. Hughes
A. Iverson - Colorado State University
A. Jamil - Yale University
C. Jessiman - Carleton University
M. J. Jewell - Stanford University
A. Johnson
A. Karelin - Kurchatov Institute
L. J. Kaufman - SLAC National Accelerator Laboratory
T. Koffas - Carleton University
R. Krücken - University of British Columbia
A. Kuchenkov - Kurchatov Institute
K. S. Kumar - University of Massachusetts Amherst
Y. Lan - TRIUMF
A. Larson
B. G. Lenardo - SLAC National Accelerator Laboratory
D. S. Leonard - IBS Center for Underground Physics (Republic of Korea, Daejeon)
G. S. Li - Stanford University
S. Li
Z. Li
C. Licciardi - Laurentian University
Y. H. Lin - Drexel University, Information Science
R. MacLellan - TRIUMF
T. McElroy
T. Michel - Friedrich-Alexander-Universität Erlangen-Nürnberg
B. Mong - TRIUMF
D. C. Moore - University of New Haven
K. Murray - McGill University
O. Njoya - Stony Brook University
O. Nusair - University of Alabama
A. Odian - SLAC National Accelerator Laboratory
I. Ostrovskiy - University of Alabama
A. Perna - Laurentian University
A. Piepke - University of Alabama
A. Pocar - University of Massachusetts Amherst
F. Retière - TRIUMF
A. L. Robinson
P. C. Rowson - SLAC National Accelerator Laboratory
J. Runge - Triangle Universities Nuclear Laboratory
S. Schmidt - Friedrich-Alexander-Universität Erlangen-Nürnberg
D. Sinclair - Carleton University
K. Skarpaas - SLAC National Accelerator Laboratory
A. K. Soma - Drexel University, Physics
V. Stekhanov - Kurchatov Institute
M. Tarka - University of Massachusetts Amherst
S. Thibado - University of Massachusetts Amherst
J. Todd
T. Tolba - Institute of High Energy Physics
T. I. Totev - McGill University
R. Tsang - University of Alabama
B. Veenstra - Carleton University
V. Veeraraghavan - University of Alabama, Tuscaloosa
P. Vogel - California Institute of Technology
J. -L. Vuilleumier - University of Bern
M. Wagenpfeil - Friedrich-Alexander-Universität Erlangen-Nürnberg
J. Watkins - Carleton University
M. Weber - Stanford University
L. J. Wen - Institute of High Energy Physics
U. Wichoski - Carleton University
G. Wrede
S. X. Wu
Q. Xia - University of New Haven
D. R. Yahne - Colorado State University
L. Yang
Y. -R. Yen - Drexel University
O. Ya Zeldovich - Institute for Theoretical and Experimental Physics
T. Ziegler - Friedrich-Alexander-Universität Erlangen-Nürnberg
Publication Details: Chinese physics C, v 47(10), 103001
Publisher: IOP Publishing
Resource Type: Journal article
Language: English
Academic Unit: Information Science; Physics
Web of Science ID: WOS:001068857600001
Scopus ID: 2-s2.0-85175428576
Other Identifier: 991021228971704721

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Collaboration types: Domestic collaboration; International collaboration
Web of Science research areas: Physics, Nuclear; Physics, Particles & Fields

Search for two-neutrino double-beta decay of 136Xe to the $0$$^{+}_{1}$ excited state of 136Ba with the complete EXO-200 dataset

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