Search for nucleon decays with EXO-200

J. B. Albert,G. Anton,I. Badhrees,P. S. Barbeau,R. Bayerlein,D. Beck,V. Belov,M. Breidenbach,T. Brunner,G. F. Cao,W. R. Cen,C. Chambers,B. Cleveland,M. Coon,A. Craycraft, W. Cree,T. Daniels,M. Danilov,S. J. Daugherty, J. Daughhetee, J. Davis,S. Delaquis,A. Der Mesrobian-Kabakian,R. DeVoe, T. Didberidze,J. Dilling,A. Dolgolenko,M. J. Dolinski,W. Fairbank Jr.,J. Farine,S. Feyzbakhsh, P. Fierlinger,D. Fudenberg, R. Gornea,K. Graham,G. Gratta,C. Hall,E. V. Hansen,J. Hoessl,S. Homiller,P. Hufschmidt, M. Hughes,A. Jamil,M. J. Jewell, A. Johnson,S. Johnston,A. Karelin,L. J. Kaufman,T. Koffas,S. Kravitz,R. Krücken,A. Kuchenkov,K. S. Kumar,Y. Lan,D. S. Leonard,G. S. Li,S. Li,C. Licciardi,Y. H. Lin,R. MacLellan,T. Michel,B. Mong,D. Moore,K. Murray,R. Nelson,O. Njoya,A. Odian,I. Ostrovskiy,A. Piepke,A. Pocar,F. Retière,A. L. Robinson,P. C. Rowson,S. Schmidt,A. Schubert,D. Sinclair,A. K. Soma,V. Stekhanov,M. Tarka,T. Tolba,R. Tsang,P. Vogel,J. -L. Vuilleumier, M. Wagenpfeil, A. Waite,T. Walton,M. Weber, L. J. Wen,U. Wichoski, G. Wrede,L. Yang,Y. -R. Yen,O. Ya. Zeldovich,J. Zettlemoyer,T. Ziegler

Physical Review D（2018）

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摘要

A search for instability of nucleons bound in Xe-136 nuclei is reported with 223 kg.yr exposure of Xe-136 in the EXO-200 experiment. Lifetime limits of 3.3 x 10(23) and 1.9 x 10(23) yr are established for nucleon decay to Sb-133 and Te-133, respectively. These are the most stringent to date, exceeding the prior decay limits by a factor of 9 and 7, respectively.

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