Search for Baryon-Number-Violating Processes in B^- Decays to the
Ξ̅_c^0Λ̅_c^- Final State
Belle Collaboration,T. Gu,V. Savinov,I. Adachi,H. Aihara,D. M. Asner,H. Atmacan,T. Aushev,R. Ayad,Sw. Banerjee,K. Belous,J. Bennett,M. Bessner,V. Bhardwaj,B. Bhuyan,D. Biswas,A. Bobrov,D. Bodrov,J. Borah,A. Bozek,M. Bračko,P. Branchini,T. E. Browder,A. Budano,M. Campajola,D. Červenkov,M. -C. Chang,P. Chang,B. G. Cheon,K. Chilikin,K. Cho,S. -K. Choi,Y. Choi,S. Choudhury,S. Das,G. De Nardo,G. De Pietro,R. Dhamija,F. Di Capua,J. Dingfelder,Z. Doležal,T. V. Dong,S. Dubey,P. Ecker,T. Ferber,D. Ferlewicz,B. G. Fulsom,V. Gaur,A. Giri,P. Goldenzweig,E. Graziani,Y. Guan,K. Gudkova,C. Hadjivasiliou,K. Hayasaka,H. Hayashii,M. T. Hedges,D. Herrmann,W. -S. Hou,C. -L. Hsu,N. Ipsita,A. Ishikawa,R. Itoh,M. Iwasaki,W. W. Jacobs,S. Jia,Y. Jin,K. K. Joo,T. Kawasaki,C. Kiesling,C. H. Kim,D. Y. Kim,K. -H. Kim,Y. J. Kim,P. Kodyš,A. Korobov,S. Korpar,E. Kovalenko,P. Križan,P. Krokovny,T. Kuhr,K. Kumara,T. Kumita,Y. -J. Kwon,Y. -T. Lai,S. C. Lee,D. Levit,L. K. Li,Y. B. Li,L. Li Gioi,D. Liventsev,M. Masuda,T. Matsuda,S. K. Maurya,F. Meier,M. Merola,F. Metzner,K. Miyabayashi,R. Mizuk,G. B. Mohanty,R. Mussa,I. Nakamura,M. Nakao,Z. Natkaniec,A. Natochii,L. Nayak,M. Nayak,M. Niiyama,S. Nishida,S. Ogawa,G. Pakhlova,S. Pardi,H. Park,J. Park,S. -H. Park,A. Passeri,S. Patra,S. Paul,T. K. Pedlar,R. Pestotnik,L. E. Piilonen,T. Podobnik,E. Prencipe,M. T. Prim,M. Röhrken,G. Russo,S. Sandilya,L. Santelj,G. Schnell,C. Schwanda,Y. Seino,K. Senyo,M. E. Sevior,W. Shan,C. Sharma,J. -G. Shiu,E. Solovieva,M. Starič,M. Takizawa,U. Tamponi,K. Tanida,F. Tenchini,R. Tiwary,K. Trabelsi,M. Uchida,Y. Unno,S. Uno,Y. Usov,S. E. Vahsen,K. E. Varvell,A. Vinokurova,E. Wang,M. -Z. Wang,X. L. Wang,S. Watanuki,E. Won,X. Xu,B. D. Yabsley,W. Yan,S. B. Yang,L. Yuan,Z. P. Zhang,V. Zhilich,V. Zhukova
arxiv（2024）
引用0|浏览20
暂无评分
摘要
We report the results of the first search for B^- decays to the
Ξ̅_c^0Λ̅_c^- final state using 711 fb^-1
of data collected at the Υ(4S) resonance with the Belle detector at
the KEKB asymmetric-energy e^+ e^- collider. The results are interpreted in
terms of both direct baryon-number-violating B^- decay and
Ξ_c^0-Ξ̅_c^0 oscillations which follow the Standard Model
decay B^- →Ξ_c^0Λ̅_c^-. We observe no evidence for
baryon number violation and set the 95% confidence-level upper limits on the
ratio of baryon-number-violating and Standard Model branching fractions
ℬ(B^- →Ξ̅_c^0Λ̅_c^-)/ℬ(B^- →Ξ_c^0Λ̅_c^-) to be < 2.7% and on the Ξ_c^0 -
Ξ̅_c^0 oscillation angular frequency ω to be < 0.76ps^-1 (equivalent to τ_ mix > 1.3 ps).
