M. Sumihama,I. Adachi,J. K. Ahn,H. Aihara,S. Al Said,D. M. Asner,H. Atmacan,T. Aushev,R. Ayad,V. Babu,I. Badhrees,S. Bahinipati,A. M. Bakich,V. Bansal,C. Beleño,Martin Berger,V. Bhardwaj,B. Bhuyan,T. Bilka,Jyoti Prakash Biswal,G. Bonvicini,A. Bożek,M. Bračko,T. E. Browder,D. Červenkov,V. Chekelian,A. Chen,B. G. Cheon,K. Chilikin,K. Cho,S. K. Choi,Y. Choi,S. Choudhury,D. Cinabro,S. Cunliffe,T. Czank,N. Dash,S. Di Carlo,Z. Doležal,T. V. Dong,Z. Drásal,S. Eidelman,D. Epifanov,J. E. Fast,B. G. Fulsom,Rocky Bala Garg,V. Gaur,N. Gabyshev,A. Garmash,M. Gelb,A. Giri,P. Goldenzweig,E. Guido,J. Haba,K. Hayasaka,H. Hayashii,S. Hirose,W.-S. Hou,K. Inami,G. Inguglia,A. Ishikawa,R. Itoh,M. Iwasaki,M. Iwasaki,W. W. Jacobs,H. B. Jeon,S. Jia,Y. Jin,K. K. Joo,T. Julius,A. B. Kaliyar,K. H. Kang,G. Karyan,Y. Kato,C. Kiesling,D. Y. Kim,J. B. Kim,K. T. Kim,S. H. Kim,K. Kinoshita,P. Kodyš,S. Korpar,D. Kotchetkov,P. Križan,R. Kroeger,P. Krokovny,R. Kumar,A. Kuzmin,Y. J. Kwon,J. S. Lange,I. S. Lee,S. C. Lee,L. K. Li,Y. B. Li,L. Li Gioi,J. Libby,D. Liventsev,M. Lubej,T. Luo,M. Masuda,T. Matsuda,D. Matvienko,M. Merola,K. Miyabayashi,H. Miyata,R. Mizuk,G. B. Mohanty,H. K. Moon,Takashi Mori,R. Mussa,E. Nakano,Takashi Nakano,M. Nakao,T. Nanut,K. J. Nath,Z. Natkaniec,M. Niiyama,N. K. Nisar,S. Nishida,H. Ono,P. Pakhlov,G. Pakhlova,B. K. Pal,S. Pardi,H. Park,S. Paul,T. K. Pedlar,R. Pestotnik,L. E. Piilonen,V. Popov,M. Ritter,G. Russo,Deepak Kumar Sahoo,S. Sandilya,L. Šantelj,T. Sanuki,V. Savinov,O. Schneider,G. Schnell,C. Schwanda,Y. Seino,K. Senyo,M. E. Sevior,V. Shebalin,C. P. Shen,T. A. Shibata,J. G. Shiu,B. Shwartz,F. Simon,A. Sokolov,E. Solovieva,M. Starič,J. Strube,T. Sumiyoshi,M. Takizawa,U. Tamponi,K. Tanida,N. Taniguchi,F. Tenchini,M. Uchida,T. Uglov,S. Uno,P. Urquijo,S. E. Vahsen,C. Van Hulse,G. Varner,V. Vorobyev,A. Vossen,B. Wang,C. H. Wang,M.-Z. Wang,P. Wang,X. L. Wang,M. Watanabe,S. Watanuki,E. Widmann,E. Won,H. Ye,J. Yelton,C. Z. Yuan,Y. Yusa,S. Zakharov,Z. P. Zhang,V. Zhilich,V. Zhukova,V. Zhulanov
Physical Review Letters（2019）
引用13|浏览5
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摘要
We report the first observation of the double strange baryon Ξ(1620)^{0} in its decay to Ξ^{-}π^{+} via Ξ_{c}^{+}→Ξ^{-}π^{+}π^{+} decays based on a 980 fb^{-1} data sample collected with the Belle detector at the KEKB asymmetric-energy e^{+}e^{-} collider. The mass and width are measured to be 1610.4±6.0(stat)_{-4.2}^{+6.1} (syst) MeV/c^{2} and 59.9±4.8(stat)_{-7.1}^{+2.8}(syst) MeV, respectively. We obtain 4.0σ evidence of the Ξ(1690)^{0} with the same data sample. These results shed light on the structure of hyperon resonances with strangeness S=-2.
