Observation Of A New Charged Charmoniumlike State In B-0 -> J/Psi K- Pi(+) Decays

K Chilikin,D Liventsev,B R Ko,Z P Zhang,K Sumisawa,D Epifanov,V Chekelian,V Zhilich,S Uehara,K Hayasaka,S Al Said,P Lukin,T Uglov,E Won,Y Choi,T Mori,K K Joo,G Tatishvili,I Jaegle,H Park,O Grzymkowska,Tetsuya Sumiyoshi,S Okuno,M Ritter,G B Mohanty,K Cho,B G Cheon,Peixiang Wang,O Frost,B Golob,K Arinstein,A Ishikawa,J S Lange,A Bozek,J Libby,H J Hyun,Yoshiyuki Watanabe,Y J Kwon,J Fast,C P Shen,L Santelj,G Varner,P Vanhoefer,H Hayashii,S Uno,X H He,Y Sakai,J Haba,S Korpar,M Petric,S Ogawa,M Huschle,T Julius,T Aushev,A Rostomyan,G Bonvicini,R Mizuk,E Solovieva,L E Piilonen,D Y Kim,T K Pedlar,N K Nisar,P Krizan,O Schneider,M Bracko,H Farhat,Z Natkaniec,V Aulchenko,A Moll,K Kinoshita,M Z Wang,E Nedelkovska,I Adachi,T Aziz,O Seon, Yuanxun Li,J Yamaoka,M N Wagner,T A Shibata,K Dutta,Hidemi Miyata,M Staric,Y Unno,Y S Sohn,K M Williams,Sanmay Ganguly,R Chistov,T Ferber,U Tamponi,S Wehle,M Steder,R Gillard,S Eidelman,Chan Woo Park,S Yashchenko,V Zhulanov,R Mussa,R Ayad,M Nakao,C Schwanda,H Aihara,H J Kim,X L Wang,T Sanuki,A Vinokurova,Aizheng Chen,T Kawasaki,V Chobanova,T E Browder,K Tanida,N Gabyshev,W S Hou,A Drutskoy,P Krokovny,P Pakhlov,D M Asner, Jin Hong Kim,Yusuke Sato,D Cervenkov,F Simon,V Bansal,Yu Jin Kim,Y M Goh,V Shebalin,Y Teramoto,C H Wang,V Gaur,A Bondar,S K Choi,C Van Hulse,A Sibidanov,T Kuhr,K Miyabayashi,D Cinabro,Z Dolezal,R Itoh,J G Shiu,A Zupanc,F Thorne,Y Iwasaki,G Schnell,M Danilov,A Sokolov,K Trabelsi,Myung Joon Kim,E Ribezl,V Savinov,P Urquijo,A Kuzmin,Z Drasal,Y Liu,E Nakano,G Pakhlova,S Nishida,S Sandilya,B Shwartz,T Nanut,T Hara,A Garmash,A M Bakich,C Kiesling,L Li Gioi,M Uchida

PHYSICAL REVIEW D（2014）

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摘要

We present the results of an amplitude analysis of B-0 --> J/psi K- pi(+) decays. A new charged charmoniumlike state Z(c)(4200)(+) decaying to J/psi pi(+) is observed with a significance of 6.2 sigma. The mass and width of the Z(c)(4200)(+) are 4196(-29-13)(+31+17) MeV/c(2) and 370(-70-132)(+70+70) MeV, respectively; the preferred assignment of the quantum numbers is J(P) = 1(+). In addition, we find evidence for Z(c)(4430)(+) --> J/psi pi(+). The analysis is based on a 711 fb(-1) data sample collected by the Belle detector at the asymmetric-energy e(+)e(-) collider KEKB.

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