Evidence of a New Excited Charmed Baryon Decaying to Sigma(c) (2455)(0,+ +) pi(+/-)
Y. B. Li,C. P. Shen,I. Adachi,H. Aihara,D. M. Asner,H. Atmacan,T. Aushev,R. Ayad,V. Babu,S. Bahinipati,P. Behera,K. Belous,J. Bennett,M. Bessner,V. Bhardwaj,B. Bhuyan,T. Bilka,D. Bodrov,J. Borah,A. Bozek,M. Bracko,P. Branchini,T. E. Browder,A. Budano,M. Campajola,D. Cervenkov,M. -c. Chang,P. 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 Pietro,R. Dhamija,F. Di Capua,J. Dingfelder,Z. Dolezal,T. V. Dong,D. Dossett,D. Epifanov,B. G. Fulsom,R. Garg,V. Gaur,A. Garmash,A. Giri,P. Goldenzweig,E. Graziani,T. Gu,Y. Guan,K. Gudkova,C. Hadjivasiliou,K. Hayasaka,H. Hayashii,W. -s. Hou,C. -l. Hsu,T. Iijima,K. Inami,N. Ipsita,A. Ishikawa,R. Itoh,M. Iwasaki,Y. Iwasaki,W. W. Jacobs,E. -j. Jang,Q. P. Ji,S. Jia,Y. Jin,K. K. Joo,G. Karyan,T. Kawasaki,H. Kichimi,C. Kiesling,C. H. Kim,D. Y. Kim,K. -h. Kim,Y. -k. Kim,H. Kindo,K. Kinoshita,P. Kodys,T. Konno,A. Korobov,S. Korpar,E. Kovalenko,P. Krizan,P. Krokovny,M. Kumar,R. Kumar,K. Kumara,Y. -j. Kwon,T. Lam,J. S. Lange,M. Laurenza,S. C. Lee,C. H. Li,J. Li,L. K. Li,Y. Li,L. Li Gioi,J. Libby,K. Lieret,D. Liventsev,M. Masuda,T. Matsuda,D. Matvienko,S. K. Maurya,F. Meier,M. Merola,F. Metzner,K. Miyabayashi,R. Mizuk,G. B. Mohanty,I. Nakamura,M. Nakao,Z. Natkaniec,A. Natochii,L. Nayak,M. Niiyama,N. K. Nisar,S. Nishida,S. Ogawa,H. Ono,P. Oskin,P. Pakhlov,G. Pakhlova,S. Pardi,H. Park,S. -h. Park,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,L. Santelj,V. Savinov,G. Schnell,J. Schueler,C. Schwanda,Y. Seino,K. Senyo,M. E. Sevior,M. Shapkin,C. Sharma,J. -g. Shiu,J. B. Singh,A. Sokolov,E. Solovieva,M. Staric,Z. S. Stottler,M. Sumihama,T. Sumiyoshi,W. Sutcliffe,M. Takizawa,U. Tamponi,K. Tanida,F. Tenchini,K. Trabelsi,T. Tsuboyama,M. Uchida,T. Uglov,Y. Unno,S. Uno,Y. Usov,R. van Tonder,G. Varner,K. E. Varvell,E. Waheed,E. Wang,M. -z. Wang,M. Watanabe,S. Watanuki,O. Werbycka,J. Wiechczynski,E. Won,B. D. Yabsley,W. Yan,S. B. Yang,J. Yelton,J. H. Yin,C. Z. Yuan,Y. Yusa,Y. Zhai,Z. P. Zhang,V. Zhilich,V. Zhukova
PHYSICAL REVIEW LETTERS（2023）
引用1|浏览20
暂无评分
摘要
We present the study of (B) over bar (0) -> Sigma(c)(2455)(0, + +) pi(+/-)(p) over bar decays based on 772 x 10(6) B (B) over bar events collected with the Belle detector at the KEKB asymmetric-energy e(+) e(-) collider. The Sigma(c)(2455)(0, + +) candidates are reconstructed via their decay to Lambda(+)(c)x(-/+) and Lambda(+)(c) decays to pK(-)pi(+), pK(S)(0), and Lambda pi(+) final states. The corresponding branching fractions are measured to be B((B) over bar (0) -> Sigma(c)(2455)(0)pi(+)(p) over bar) = (1.09 +/- 0.06 +/- 0.07) x 10(-4) and B((B) over bar (0) -> Sigma(c)(2455)(+ +)pi(-)(p) over bar) = (1.84 +/- 0.11 +/- 0.12) x 10(-4), which are consistent with the world average values with improved precision. A new structure is found in the M-Sigma c(2455)0,M- + + pi +/- spectrum with a significance of 4.2 sigma including systematic uncertainty. The structure is possibly an excited Lambda(+)(c) and is tentatively named Lambda(c)(2910)(+). Its mass and width are measured to be (2913.8 +/- 5.6 +/- 3.8) MeV/c(2) and (51.8 +/- 20.0 +/- 18.8) MeV, respectively. The products of branching fractions for the Lambda(c)(2910)(+) are measured to be B((B) over bar (0) -> Lambda(c)(2910)(+)(p) over bar) x B(Lambda(c)(2910)(+) -> Sigma(c)(2455)(0)pi(+)) = (9.5 +/- 3.6 +/- 1.6) x 10(-6) and B((B) over bar (0) -> Lambda(c)(2910)(+)(p) over bar) x B(Lambda(c)(2910)(+) -> Sigma(c)(2455)(+ +)pi(-)) = (1.24 +/- 0.35 +/- 0.10) x 10(-5). Here, the first and second uncertainties are statistical and systematic, respectively.
