Observation of a Charged Charmoniumlike Structure Z(c) (4020) and Search for the Z(c) (3900) in e(+)e(-) -> pi(+) pi(-)h(c)
M. Ablikim,M. N. Achasov,O. Albayrak,D. J. Ambrose,Fenfen An,Q. An,J. Z. Bai,R. Baldini Ferroli,Y. Ban,Jürgen Becker,J. V. Bennett,M. Bertani,J. M. Bian,E. Boger,O. Bondarenko,Igor Boyko,S. Braun,R. A. Briere,V. V. Bytev,H. Cai,X. Cai,O. Cakir,A. Calcaterra,A. Calcaterra,G. F. Cao,Serkant Ali Cetin,J. F. Chang,G. A. Chelkov,G. F. Chen,H. S. Chen,J. C. Chen,M. L. Chen,S. J. Chen,X. R. Chen,Y. B. Chen,H. P. Cheng,X. K. Chu,Y. P. Chu,D. Cronin-Hennessy,H. L. Dai,J. P. Dai,D. V. Dedovich,Z. Y. Deng,A. G. Denig,I. Denysenko,M. Destefanis,M. Destefanis,W. M. Ding,Y. Ding,L. Y. Dong,M. Y. Dong,S. X. Du,J. Fang,S. S. Fang,L. Fava,L. Fava,C. Q. Feng,P. Friedel,C. D. Fu,J. L. Fu,O. Fuks,Y.N. Gao,C. Geng,K. Goetzen,W. X. Gong,W. Gradl,M. Greco,M. Greco,M. H. Gu,Y. T. Gu,Y. H. Guan,A. Q. Guo,L. B. Guo,T. Guo,Y. P. Guo,Y. L. Han,F. A. Harris,K. L. He,Miao He,Z. Y. He,T. Held,Y. K. Heng,Z. L. Hou,C. Hu,H. M. Hu,Jifeng Hu,T. Hu,Guangming Huang,G. S. Huang,J. S. Huang,L. Huang,X. T. Huang,Yucheng Huang,Talib Hussain,C. S. Ji,Q. P. Ji,Q. P. Ji,X. B. Ji,X. L. Ji,L. L. Jiang,X. S. Jiang,J. B. Jiao,Z. Jiao,D. P. Jin,S. Jin,F. F. Jing,Nasser Kalantar-Nayestanaki,M. Kavatsyuk,B. Kloss,B. Kopf,M. Kornicer,W. Kuehn,W. Lai,J. S. Lange,M. Lara,P. Larin,M. Leyhe,C. H. Li,Cheng Li,Cui Li,D. Li,D. M. Li,F. Li,G. Li,H. B. Li,J. C. Li,K. Li,Lei Li,N. Li,P. R. Li,Q. J. Li,W. D. Li,W. G. Li,Xingguo Li,X. N. Li,X. Q. Li,X. R. Li,Z. B. Li,H. Liang,Y. F. Liang,Y. T. Liang,G. R. Liao,D. X. Lin,B. J. Liu,Chuan Liu,C. X. Liu,Fu-Hu Liu,Fang Liu,Feng Liu,H. B. Liu,Huihui Liu,H. M. Liu,J. P. Liu,Kai Liu,K. Y. Liu,P. L. Liu,Q. Liu,S. B. Liu,X. Liu,Y. B. Liu,Z. A. Liu,Zhiqiang Liu,Zhiqing Liu,H. Loehner,X. C. Lou,G. R. Lu,H. J. Lu,J. G. Lu,Xiao-Tong Lu,Y. P. Lu,C. L. Luo,M. X. Luo,Tao Luo,X. L. Luo,M. Lv,F. C. Ma,H. L. Ma,Q. M. Ma,S. Ma,T. Ma,X. Y. Ma,F. E. Maas,M. Maggiora,M. Maggiora,Q. A. Malik,Y. J. Mao,Z. P. Mao,J. G. Messchendorp,J. Min,T. J. Min,R. E. Mitchell,X. H. Mo,H. Moeini,C. Morales Morales,K. Moriya,N. Yu. Muchnoi,H. Muramatsu,Y. Nefedov,I. B. Nikolaev,Z. Ning,S. Nisar,S. L. Olsen,Q. Ouyang,S. Pacetti,J. W. Park,M. Pelizaeus,Haiping Peng,Krisztian Peters,Jialun Ping,R. G. Ping,R. Poling,E. Prencipe,M. Qi,S. Qian,Cong-Feng Qiao,L. Q. Qin,X. S. Qin,Yang Qin,Z. H. Qin,J. F. Qiu,K. H. Rashid,C. F. Redmer,M. Ripka,G. Rong,Xiangdong Ruan,A. Sarantsev,S. Schumann,W. Shan,M. Shao,C. P. Shen,X. Y. Shen,H. Y. Sheng,M. R. Shepherd,W. M. Song,X. Y. Song,S. Spataro,S. Spataro,B. Spruck,G. X. Sun,J. F. Sun,S. S. Sun,Y. J. Sun,Y. Z. Sun,Z. J. Sun,Zhe Sun,C. J. Tang,X. Tang,I. Tapan,E. H. Thorndike,D. Toth,M. Ullrich,I. Uman,G. S. Varner,B. Q. Wang,Dayong Wang,D. Y. Wang,Ke Wang,L. L. Wang,L. S. Wang,Meng Wang,P. L. Wang,P. L. Wang,Qun-Yao Wang,Shan Wang,Xuejun Wang,X. L. Wang,Y. D. Wang,Y. F. Wang,Y. Q. Wang,Zujian Wang,Z. G. Wang,Z. H. Wang,Z. Y. Wang,D. H. Wei,Jian Wei,P. Weidenkaff,Q. G. Wen,S. P. Wen,Michael Werner,Ulrich Wiedner,L. H. Wu,N. Wu,Sanfeng Wu,Wei Wu,Z. Wu,L. G. Xia,Y. X. Xia,Z. J. Xiao,Y. G. Xie,Q. L. Xiu,G. F. Xu,Q. J. Xu,Qiunan Xu,X. P. Xu,Zhenli Xu,Z. Xue,Li Yan,W. B. Yan,W. C. Yan,Y. H. Yan,H. X. Yang,Yang Yang,Y. X. Yang,Y. Z. Yang,Heng-Yun Ye,M. H. Ye,M. H. Ye,B. X. Yu,C. X. Yu,Hai Yu,Jie Yu,S. P. Yu,C. Z. Yuan,W. L. Yuan,Y. Yuan,A. A. Zafar,A. Zallo,S. L. Zang,Y. Zeng,B. X. Zhang,B. Y. Zhang,Chi Zhang,C. B. Zhang,C. C. Zhang,D. H. Zhang,H. H. Zhang,H. Y. Zhang,J. Q. Zhang,J. W. Zhang,J. Y. Zhang,J. Z. Zhang,LiLi Zhang,S. H. Zhang,Xuantong Zhang,X. Y. Zhang,Y. Zhang,Y. H. Zhang,Z. P. Zhang,Zhenyu Zhang,Zhenghao Zhang,Gang Zhao,J. W. Zhao,Lei Zhao,Ling Zhao,M. G. Zhao,Q. Zhao,Shujun Zhao,T. C. Zhao,X. H. Zhao,Y. B. Zhao,Z. G. Zhao,A. Zhemchugov,B. Zheng,Jianping Zheng,Y. H. Zheng,B. Zhong,L. P. Zhou,Xiang Zhou,X. K. Zhou,X. R. Zhou,K. J. Zhu,K. J. Zhu,Xiaofeng Zhu,Y. C. Zhu,Y. S. Zhu,Z. A. Zhu,J. Zhuang,B. S. Zou,J. H. Zou +368 more
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E+e-→π+π-hc at center-of-mass energies from 3.90 to 4.42 GeV is studied by using data samples collected with the BESIII detector operating at the Beijing Electron Positron Collider and a distinct structure, referred to as Zc(4020), is observed in the π±hc mass spectrum.Abstract:
We study e(+)e(-) -> pi(+) pi(-)h(c) at center-of-mass energies from 3.90 to 4.42 GeV by using data samples collected with the BESIII detector operating at the Beijing Electron Positron Collider. The Born cross sections are measured at 13 energies and are found to be of the same order of magnitude as those of e(+)e(-) -> pi(+) pi(-) J/Psi but with a different line shape. In the pi(+/-)h(c) mass spectrum, a distinct structure, referred to as Z(c)(4020) is observed at 4. 02 GeV/c(2). The Z(c)(4020) carries an electric charge and couples to charmonium. A fit to the pi(+/-)h(c) invariant mass spectrum, neglecting possible interferences, results in a mass of (4022.9 +/- 0.8 +/- 2.7) MeV/c(2) and a width of (7.9 +/- 2.7 +/- 2.6) MeV for the Z(c)(4020), where the first errors are statistical and the second systematic. The difference between the parameters of this structure and the Z(c) (4025) observed in the D*(D) over bar* final state is within 1.5 sigma, but whether they are the same state needs further investigation. No significant Z(c)(3900) signal is observed, and upper limits on the Z(c)(3900) production cross sections in pi +/- h(c) at center-of-mass energies of 4.23 and 4.26 GeVare set.read more
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A.E. Bondar,A. Garmash,R. Mizuk,D. Santel,K. Kinoshita,I. Adachi,H. Aihara,K. Arinstein,D. M. Asner,T. Aushev,Tariq Aziz,A. M. Bakich,E. L. Barberio,K. Belous,V. Bhardwaj,M. Bischofberger,A. Bozek,M. Bračko,T. E. Browder,M. C. Chang,P. Chang,A. Chen,B. G. Cheon,K. Chilikin,R. Chistov,I. S. Cho,K. Cho,S. K. Choi,Y. Choi,J. Dalseno,M. Danilov,Z. Doleal,A. Drutskoy,S.I. Eidelman,D. Epifanov,James E. Fast,V. Gaur,N. Gabyshev,Y. M. Goh,B. Golob,J. Haba,T. Hara,K. Hayasaka,Y. Hoshi,H. J. Hyun,T. Iijima,K. Inami,A. Ishikawa,M. Iwabuchi,Y. Iwasaki,T. Iwashita,T. Julius,J. H. Kang,T. Kawasaki,H. Kichimi,C. Kiesling,J. B. Kim,Jung-Hyun Kim,K. T. Kim,M. J. Kim,Yongsun Kim,B. R. Ko,Nagao Kobayashi,S. Koblitz,P. Kody,S. Korpar,P. Krian,T. Kuhr,Rakesh Kumar,T. Kumita,A. Kuzmin,J. S. Lange,Sang Hoon Lee,J. Li,Yang Li,J. Libby,C. Liu,Z. Q. Liu,D. Liventsev,R. Louvot,D. Matvienko,S. McOnie,H. Miyata,Y. Miyazaki,G. B. Mohanty,A. Moll,Norihito Muramatsu,R. Mussa,M. Nakao,Z. Natkaniec,S. Neubauer,M. Niiyama,S. Nishida,K. Nishimura,O. Nitoh,T. Nozaki,S. L. Olsen,Y. Onuki,P. Pakhlov,G. Pakhlova,H. Park,H. K. Park,T. K. Pedlar,Marko Petrič,L. E. Piilonen,Anton Poluektov,M. T. Prim,M. Ritter,M. Röhrken,Sunmin Ryu,H. Sahoo,Y. Sakai,T. Sanuki,O. Schneider,C. Schwanda,K. Senyo,M. E. Sevior,M. Shapkin,V.E. Shebalin,T. A. Shibata,J. G. Shiu,B.A. Shwartz,Frank Simon,P. Smerkol,Y. S. Sohn,Andrey Sokolov,E. Solovieva,M. Starič,M. Sumihama,T. Sumiyoshi,Satoshi Tanaka,G. Tatishvili,Y. Teramoto,I. Tikhomirov,M. Uchida,S. Uehara,T. Uglov,Y. Ushiroda,S. E. Vahsen,G. S. Varner,A. Vinokurova,C. H. Wang,M. Z. Wang,P. Wang,X. L. Wang,Y. Watanabe,K. M. Williams,E. Won,Bruce Yabsley,Y. Yamashita,M. Yamauchi,C. Z. Yuan,Y. Yusa,Z. P. Zhang,V.N. Zhilich,Vladimir Zhulanov,Anze Zupanc,O. Zyukova +157 more
Observation of a Resonancelike Structure in the π +- ψ ' Mass Distribution in Exclusive B→Kπ +- ψ ' Decays
Suyong Choi,S. L. Olsen,I. Adachi,Hiroaki Aihara,V. M. Aulchenko,T. Aushev,Tariq Aziz,A. M. Bakich,Vladislav Balagura,I. Bedny,U. Bitenc,A. Bondar,A. Bozek,M. Bračko,Jolanta Brodzicka,T. E. Browder,P. Chang,Y. Chao,A. Chen,K. F. Chen,W. T. Chen,Byung Gu Cheon,R. Chistov,Y. Choi,J. Dalseno,M. Danilov,M. Dash,S. Eidelman,N. Gabyshev,B. Golob,J. Haba,T. Hara,K. Hayasaka,H. Hayashii,Masashi Hazumi,D. Heffernan,Y. Hoshi,W. S. Hou,H. J. Hyun,T. Iijima,K. Inami,A. Ishikawa,Hirokazu Ishino,R. Itoh,M. Iwasaki,Y. Iwasaki,D. H. Kah,J. H. Kang,N. Katayama,H. Kawai,T. Kawasaki,H. Kichimi,H. O. Kim,S. K. Kim,Y. J. Kim,K. Kinoshita,P. Križan,P. Krokovny,Rakesh Kumar,C. C. Kuo,A.S. Kuzmin,Y. J. Kwon,J. S. Lange,Joowon Lee,M. J. Lee,S. E. Lee,T. Lesiak,Antonio Limosani,S. W. Lin,Yu-xi Liu,D. Liventsev,F. Mandl,A. Matyja,S. McOnie,Tatiana Medvedeva,W. A. Mitaroff,K. Miyabayashi,H. Miyake,H. Miyata,Y. Miyazaki,R. Mizuk,G. R. Moloney,E. Nakano,M. Nakao,S. Nishida,O. Nitoh,T. Nozaki,S. Ogawa,T. Ohshima,S. Okuno,H. Ozaki,P. Pakhlov,G. Pakhlova,C. W. Park,H. Park,L. S. Peak,R. Pestotnik,L. E. Piilonen,H. Sahoo,Y. Sakai,O. Schneider,A. J. Schwartz,K. Senyo,M. Shapkin,C. P. Shen,H. Shibuya,B. Shwartz,Jasvinder A. Singh,A. Somov,Samo Stanič,M. Starič,T. Sumiyoshi,S. Y. Suzuki,F. Takasaki,K. Tamai,M. Tanaka,Y. Teramoto,I. Tikhomirov,S. Uehara,T. Uglov,Yoshinobu Unno,S. Uno,Phillip Urquijo,G. S. Varner,K. Vervink,S. Villa,C. H. Wang,M. Z. Wang,P. Wang,X. L. Wang,Y. Watanabe,Robin Wedd,E. Won,Bruce Yabsley,Y. Yamashita,C. Z. Yuan,Zhenyu Zhang,Vladimir Zhulanov,A. Zupanc,O. Zyukova +139 more