Measurements Of Branching Fractions And Asymmetry Parameters Of Xi(0)(C) -> Lambda(K)Over-Bar*(0), Xi(0)(C) -> Sigma(0)(K)Over-Bar*(0), And Xi(0)(C) -> Sigma(+) K*(-) Decays At Belle

S. Jia, S. S. Tang,C. P. Shen,I. Adachi,H. Aihara,S. Al Said,D. M. Asner,V. Aulchenko,T. Aushev, R. Ayad,V. Babu,S. Bahinipati,P. Behera,J. Bennett, M. Bessner, T. Bilka, J. Biswal,A. Bobrov, G. Bonvicini,A. Bozek, M. Bracko,T. E. Browder,M. Campajola,D. Cervenkov,M. -C. Chang, V. Chekelian,A. Chen,B. G. Cheon,K. Chilikin,H. E. Cho,K. Cho,S. -J. Cho,S. -K. Choi,Y. Choi,S. Choudhury,D. Cinabro,S. Cunliffe,S. Das,G. De Nardo,R. Dhamija,F. Di Capua,Z. Dolezal, T. V. Dong,S. Eidelman,D. Epifanov, T. Ferber,K. Flood,B. G. Fulsom,R. Garg,V. Gaur,N. Gabyshev, A. Garmash,A. Giri, P. Goldenzweig,O. Hartbrich, K. Hayasaka,H. Hayashii,W. -S. Hou, C. -L. Hsu,T. Iijima, K. Inami,A. Ishikawa, R. Itoh,M. Iwasaki, Y. Iwasaki,W. W. Jacobs, Y. Jin, K. K. Joo, G. Karyan,Y. Kato, H. Kichimi, C. H. Kim,D. Y. Kim,K. -H. Kim, S. H. Kim,Y. -K. Kim,K. Kinoshita, P. Kodys,T. Konno, A. Korobov, S. Korpar, E. Kovalenko, P. Krizan,R. Kroeger,P. Krokovny,T. Kuhr,K. Kumara,A. Kuzmin,Y. -J. Kwon, K. Lalwani, J. S. Lange,S. C. Lee, J. Li,L. K. Li, Y. B. Li,L. Li Gioi,J. Libby, K. Lieret,D. Liventsev, C. Macqueen,M. Masuda,T. Matsuda, D. Matvienko, J. T. Mcneil,M. Merola, F. Metzner, K. Miyabayashi,H. Miyata, R. Mizuk,G. B. Mohanty, R. Mussa, M. Nakao,A. Natochii,L. Nayak, M. Nayak, M. Niiyama,N. K. Nisar, S. Nishida,K. Nishimura,K. Ogawa,S. Ogawa,H. Ono, Y. Onuki, P. Oskin,P. Pakhlov,G. Pakhlova, S. Pardi,H. Park,S. -H. Park,S. Patra,S. Paul, R. Pestotnik,L. E. Piilonen, T. Podobnik,V. Popov, E. Prencipe,M. T. Prim, A. Rostomyan,N. Rout,G. Russo,D. Sahoo,S. Sandilya,A. Sangal, V. Savinov, G. Schnell, C. Schwanda, Y. Seino, K. Senyo,M. E. Sevior,C. Sharma,J. -G. Shiu,A. Sokolov,E. Solovieva, M. Staric,Z. S. Stottler, M. Sumihama, T. Sumiyoshi,M. Takizawa, K. Tanida, F. Tenchini, K. Trabelsi, S. Uehara,T. Uglov, Y. Unno,K. Uno,S. Uno, P. Urquijo,Y. Usov,R. Van Tonder, G. Varner,E. Waheed,C. H. Wang, M. -Z. Wang, P. Wang,M. Watanabe, O. Werbycka, E. Won,B. D. Yabsley,W. Yan, S. B. Yang,H. Ye, J. Yelton, J. H. Yin, C. Z. Yuan, Y. Yusa, Z. P. Zhang,V. Zhilich,V. Zhukova

JOURNAL OF HIGH ENERGY PHYSICS(2021)

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摘要
Using a data sample of 980 fb(-1) collected with the Belle detector at the KEKB asymmetric-energy e(+) e(-) collider, we study the processes of Xi(0)(c) -> Lambda(K) over bar*(0), Xi(0)(c) -> Sigma(0)(K) over bar*(0), and Xi(0)(c) -> Sigma(+) K*(-) for the first time. The relative branching ratios to the normalization mode of Xi(0)(c) -> Xi(-)pi(+) are measured to beB(Xi(0)(c) -> Lambda(K) over bar*(0)/B(Xi(0)(c) -> Xi(-)pi(+)) = 0.18 +/- 0.02(stat.) +/- 0.01(syst.), B(Xi(0)(c) -> Sigma(0)(K) over bar*(0)/B(Xi(0)(c) -> Xi(-)pi(+)) = 0.69 +/- 0.03(stat.) +/- 0.03(syst.), B(Xi(0)(c) -> Sigma K+*(-)/B(Xi(0)(c) -> Xi(-)pi(+)) = 0.34 +/- 0.06(stat.) +/- 0.02(syst.),where the uncertainties are statistical and systematic, respectively. We obtainB(Xi(0)(c) -> Lambda(K) over bar*(0)) = (3.3 +/- 0.3(stat.) +/- 0.2(syst.) +/- 1.0(ref.)) x 10(-3), B(Xi(0)(c) -> Sigma(0)(K) over bar*(0)) = (12.4 +/- 0.5(stat.) +/- 0.5(syst.) +/- 3.6(ref.)) x 10(-3), B(Xi(0)(c) -> Sigma K+*(-)) = (6.1 +/- 1.0(stat.) +/- 0.4(syst.) +/- 1.8(ref.)) x 10(-3),where the uncertainties are statistical, systematic, and from B(Xi(0)(c) -> Xi(-)pi(+)), respectively. The asymmetry parameters alpha(Xi(0)(c) -> Lambda(K) over tilde*(0)) and alpha(Xi(0)(c) -> Sigma K+*(-)) are 0.15 +/- 0.22(stat.) +/- 0.04(syst.) and -0.52 +/- 0.30(stat.) +/- 0.02(syst.), respectively, where the uncertainties are statistical followed by systematic.
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关键词
Branching fraction, e(+)-e(-) Experiments, Charm physics
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