Sensitivity and discovery potential of the proposed nEXO experiment to neutrinoless double beta decay

nEXO Collaboration,J. B. Albert,G. Anton,I. J. Arnquist,I. Badhrees,P. S. Barbeau,D. Beck,V. Belov,F. Bourque,J. P. Brodsky,E. Brown,T. Brunner,A. Burenkov,G. F. Cao, L. Cao,W. R. Cen,C. Chambers,S. A. Charlebois,M. Chiu,B. Cleveland,M. Coon,M. Côté,A. Craycraft, W. Cree,J. Dalmasson,T. Daniels,S. J. Daugherty,J. Daughhetee,R. DeVoe,S. Delaquis,A. Der Mesrobian-Kabakian, T. Didberidze,J. Dilling,Y. Y. Ding,M. J. Dolinski,A. Dragone,L. Fabris,W. Fairbank,J. Farine,S. Feyzbakhsh,R. Fontaine,D. Fudenberg,G. Giacomini,R. Gornea,K. Graham,G. Gratta,E. V. Hansen,D. Harris,M. Hasan,M. Heffner,E. W. Hoppe,J. Hößl,A. House,P. Hufschmidt,M. Hughes,Y. Ito,A. Iverson,A. Jamil,M. J. Jewell,X. S. Jiang,T. N. Johnson,S. Johnston,A. Karelin,L. J. Kaufman,R. Killick,T. Koffas,S. Kravitz,R. Krücken,A. Kuchenkov,K. S. Kumar,Y. Lan,D. S. Leonard, G. Li,S. Li,Z. Li,C. Licciardi,Y. H. Lin,R. MacLellan,T. Michel,B. Mong,D. C. Moore,K. Murray,R. J. Newby,Z. Ning,O. Njoya,F. Nolet,K. Odgers,A. Odian, M. Oriunno,J. L. Orrell,G. S. Ortega,I. Ostrovskiy,C. T. Overman,S. Parent,A. Piepke,A. Pocar,J. -F. Pratte,D. Qiu,V. Radeka, E. Raguzin,T. Rao,S. Rescia,F. Retière,A. Robinson, T. Rossignol,P. C. Rowson,N. Roy,R. Saldanha,S. Sangiorgio,S. Schmidt, J. Schneider,A. Schubert,D. Sinclair, K. Skarpaas VIII,A. K. Soma, G. St-Hilaire,V. Stekhanov,T. Stiegler,X. L. Sun,M. Tarka,J. Todd,T. Tolba,R. Tsang,T. Tsang,F. Vachon,V. Veeraraghavan,G. Visser, P. Vogel,J. -L. Vuilleumier,M. Wagenpfeil,Q. Wang,M. Weber,W. Wei,L. J. Wen,U. Wichoski,G. Wrede,S. X. Wu,W. H. Wu,L. Yang,Y. -R. Yen, O. Zeldovich,J. Zettlemoyer,X. Zhang,J. Zhao,Y. Zhou,T. Ziegler

PHYSICAL REVIEW C（2018）

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Abstract

The next-generation Enriched Xenon Observatory (nEXO) is a proposed experiment to search for neutrinoless double-beta (0 nu beta beta) decay in Xe-136 with a target half-life sensitivity of approximately 10(28) yr using 5 x 10(3) kg of isotopically enriched liquid-xenon in a time projection chamber. This improvement of two orders of magnitude in sensitivity over current limits is obtained by a significant increase of the Xe-136 mass, the monolithic and homogeneous configuration of the active medium, and the multiparameter measurements of the interactions enabled by the time projection chamber. The detector concept and anticipated performance are presented based upon demonstrated realizable background rates.

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