Evidence for $B^0 \to p\bar{\Sigma}^0\pi^-$ at Belle
Belle Collaboration,C. -Y. Chang,M. -Z. Wang,I. Adachi,H. Aihara,S. Al Said,D. M. Asner,H. Atmacan,T. Aushev,R. Ayad,V. Babu,Sw. Banerjee,M. Bauer,P. Behera,K. Belous,J. Bennett,F. Bernlochner,M. Bessner,T. Bilka,D. Biswas,A. Bobrov,D. Bodrov,G. Bonvicini,J. Borah,A. Bozek,M. Bračko,P. Branchini,T. E. Browder,A. Budano,M. Campajola,L. Cao,D. Červenkov,M. -C. Chang,B. G. Cheon,K. Chilikin,H. E. Cho,K. Cho,S. -J. Cho,S. -K. Choi,Y. Choi,S. Choudhury,D. Cinabro,S. Das,G. De Nardo,G. De Pietro,R. Dhamija,F. Di Capua,Z. Doležal,T. V. Dong,S. Dubey,P. Ecker,T. Ferber,D. Ferlewicz,B. G. Fulsom,V. Gaur,A. Garmash,A. Giri,P. Goldenzweig,E. Graziani,T. Gu,Y. Guan,K. Gudkova,C. Hadjivasiliou,S. Halder,T. Hara,K. Hayasaka,H. Hayashii,S. Hazra,M. T. Hedges,D. Herrmann,W. -S. Hou,C. -L. Hsu,K. Inami,N. Ipsita,A. Ishikawa,R. Itoh,M. Iwasaki,Y. Iwasaki,W. W. Jacobs,S. Jia,Y. Jin,K. K. Joo,A. B. Kaliyar,T. Kawasaki,C. Kiesling,C. H. Kim,D. Y. Kim,K. -H. Kim,Y. -K. Kim,K. Kinoshita,P. Kodyš,T. Konno,A. Korobov,S. Korpar,E. Kovalenko,P. Križan,P. Krokovny,T. Kuhr,M. Kumar,K. Kumara,A. Kuzmin,Y. -J. Kwon,Y. -T. Lai,T. Lam,M. Laurenza,S. C. Lee,D. Levit,L. K. Li,L. Li Gioi,J. Libby,K. Lieret,Y. -R. Lin,D. Liventsev,Y. Ma,M. Masuda,D. Matvienko,S. K. Maurya,F. Meier,M. Merola,F. Metzner,R. Mizuk,R. Mussa,I. Nakamura,M. Nakao,A. Natochii,L. Nayak,N. K. Nisar,S. Nishida,K. Ogawa,S. Ogawa,H. Ono,P. Oskin,P. Pakhlov,G. Pakhlova,S. Pardi,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,N. Rout,G. Russo,S. Sandilya,A. Sangal,L. Santelj,V. Savinov,G. Schnell,C. Schwanda,Y. Seino,K. Senyo,M. E. Sevior,W. Shan,M. Shapkin,C. Sharma,J. -G. Shiu,J. B. Singh,A. Sokolov,E. Solovieva,M. Starič,J. F. Strube,M. Sumihama,W. Sutcliffe,M. Takizawa,K. Tanida,F. Tenchini,R. Tiwary,K. Trabelsi,M. Uchida,Y. Unno,S. Uno,Y. Usov,S. E. Vahsen,G. Varner,K. E. Varvell,D. Wang,E. Wang,S. Watanuki,O. Werbycka,E. Won,B. D. Yabsley,W. Yan,S. B. Yang,J. H. Yin,C. Z. Yuan,L. Yuan,Y. Yusa,Z. P. Zhang,V. Zhilich,V. Zhukova
arXiv (Cornell University)（2023）
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摘要
We search for the $B^0\to p\bar{\Sigma}^0\pi^-$ decay with $\bar{\Sigma}^0 \to \bar{\Lambda}\gamma$, where the $\gamma$ is not measured, using a data sample corresponding to an integrated luminosity of 711 $\rm{fb^{-1}}$ which contains 772 $\times$ $10^{6}$ $B\bar{B}$ pairs, collected around the $\Upsilon$(4S) resonance with the Belle detector at the KEKB asymmetric-energy $e^{+}e^{-}$ collider. We measure for the first time the $B^0\to p\bar{\Sigma}^0\pi^-$ branching fraction to be $\mathcal{B}(B^0 \to p \bar\Sigma^0 \pi^-) = (1.17^{+0.43}_{-0.40}(\text{stat})\pm 0.07(\text{syst})) \times 10^{-6}$ with a significance of $3.5\sigma$. We simultaneously measure the branching fraction for the related channel $B^{0}\to p\bar{\Lambda}\pi^{-}$ with much improved precision.
