Observation of e(+)e(-) -> pi(0)pi(0)h(c) and a Neutral Charmoniumlike Structure Z(c)(4020)(0)
Articolo
Data di Pubblicazione:
2014
Abstract:
Using data collected with the BESIII detector operating at the Beijing Electron Positron Collider at center-of-mass energies of root s = 4.23, 4.26, and 4.36 GeV, we observe e(+)e(-) -> pi(0)pi(0)h(c) for the first time. The Born cross sections are measured and found to be about half of those of e(+)e(-) -> pi(+)pi(-)h(c) within less than 2 sigma. In the pi(0)h(c) mass spectrum, a structure at 4.02 GeV/c(2) is found. It is most likely to be the neutral isospin partner of the Z(c)(4020)(+/-) observed in the process of e(+)e(-) -> pi(+)pi(-)h(c) being found. A fit to the pi(0)h(c) invariant mass spectrum, with the width of the Z(c)(4020)(0) fixed to that of its charged isospin partner and possible interferences with non-Z(c)(4020)(0) amplitudes neglected, gives a mass of (4023.9 +/- 2.2 +/- 3.8) MeV/c(2) for the Z(c)(4020)(0), where the first error is statistical and the second systematic.
Tipologia CRIS:
03A-Articolo su Rivista
Elenco autori:
M. Ablikim;M. N. Achasov;X. C. Ai;O. Albayrak;M. Albrecht;D. J. Ambrose;A. Amoroso;F. F. An;Q. An;J. Z. Bai;R. Baldini Ferroli;Y. Ban;D. W. Bennett;J. V. Bennett;M. Bertani;D. Bettoni;J. M. Bian;F. Bianchi;E. Boger;O. Bondarenko;I. Boyko;R. A. Briere;H. Cai;X. Cai;O. Cakir;A. Calcaterra;G. F. Cao;S. A. Cetin;J. F. Chang;G. Chelkov;G. Chen;H. S. Chen;H. Y. Chen;J. C. Chen;M. L. Chen;S. J. Chen;X. Chen;X. R. Chen;Y. B. Chen;H. P. Cheng;X. K. Chu;Y. P. Chu;G. Cibinetto;D. Cronin-Hennessy;H. L. Dai;J. P. Dai;D. Dedovich;Z. Y. Deng;A. Denig;I. Denysenko;M. Destefanis;F. De Mori;Y. Ding;C. Dong;J. Dong;L. Y. Dong;M. Y. Dong;S. X. Du;P. F. Duan;J. Z. Fan;J. Fang;S. S. Fang;X. Fang;Y. Fang;L. Fava;F. Feldbauer;G. Felici;C. Q. Feng;E. Fioravanti;C. D. Fu;Q. Gao;Y. Gao;I. Garzia;K. Goetzen;W. X. Gong;W. Gradl;M. Greco;M. H. Gu;Y. T. Gu;Y. H. Guan;A. Q. Guo;L. B. Guo;T. Guo;Y. Guo;Y. P. Guo;Z. Haddadi;A. Hafner;S. Han;Y. L. Han;F. A. Harris;K. L. He;Z. Y. He;T. Held;Y. K. Heng;Z. L. Hou;C. Hu;H. M. Hu;J. F. Hu;T. Hu;Y. Hu;G. M. Huang;G. S. Huang;H. P. Huang;J. S. Huang;X. T. Huang;Y. Huang;T. Hussain;Q. Ji;Q. P. Ji;X. B. Ji;X. L. Ji;L. L. Jiang;L. W. Jiang;X. S. Jiang;J. B. Jiao;Z. Jiao;D. P. Jin;S. Jin;T. Johansson;A. Julin;N. Kalantar-Nayestanaki;X. L. Kang;X. S. Kang;M. Kavatsyuk;B. C. Ke;R. Kliemt;B. Kloss;O. B. Kolcu;B. Kopf;M. Kornicer;W. Kuehn;A. Kupsc;W. Lai;J. S. Lange;M. Lara;P. Larin;M. Leyhe;Cheng Li;D. M. Li;F. Li;G. Li;H. B. Li;J. C. Li;Jin Li;K. Li;K. Li;Q. J. Li;T. Li;W. D. Li;W. G. Li;X. L. Li;X. M. Li;X. N. Li;X. Q. Li;Z. B. Li;H. Liang;Y. F. Liang;Y. T. Liang;G. R. Liao;D. X. Lin;B. J. Liu;C. L. Liu;C. X. Liu;F. H. Liu;Fang Liu;Feng Liu;H. B. Liu;H. H. Liu;H. H. Liu;H. M. Liu;J. Liu;J. P. Liu;J. Y. Liu;K. Liu;K. Y. Liu;L. D. Liu;Q. Liu;S. B. Liu;X. Liu;X. X. Liu;Y. B. Liu;Z. A. Liu;Zhiqiang Liu;Zhiqing Liu;H. Loehner;X. C. Lou;H. J. Lu;J. G. Lu;R. Q. Lu;Y. Lu;Y. P. Lu;C. L. Luo;M. X. Luo;T. Luo;X. L. Luo;M. Lv;X. R. Lyu;F. C. Ma;H. L. Ma;Q. M. Ma;S. Ma;T. Ma;X. N. Ma;X. Y. Ma;F. E. Maas;M. Maggiora;Q. A. Malik;Y. J. Mao;Z. P. Mao;S. Marcello;J. G. Messchendorp;J. Min;T. J. Min;R. E. Mitchell;X. H. Mo;Y. J. Mo;H. Moeini;C. Morales Morales;K. Moriya;N. Yu. Muchnoi;H. Muramatsu;Y. Nefedov;F. Nerling;I. B. Nikolaev;Z. Ning;S. Nisar;S. L. Niu;X. Y. Niu;S. L. Olsen;Q. Ouyang;S. Pacetti;P. Patteri;M. Pelizaeus;H. P. Peng;K. Peters;J. L. Ping;R. G. Ping;R. Poling;Y. N. Pu;M. Qi;S. Qian;C. F. Qiao;L. Q. Qin;N. Qin;X. S. Qin;Y. Qin;Z. H. Qin;J. F. Qiu;K. H. Rashid;C. F. Redmer;H. L. Ren;M. Ripka;G. Rong;X. D. Ruan;V. Santoro;A. Sarantsev;M. Savrié;K. Schoenning;S. Schumann;W. Shan;M. Shao;C. P. Shen;P. X. Shen;X. Y. Shen;H. Y. Sheng;M. R. Shepherd;W. M. Song;X. Y. Song;S. Sosio;S. Spataro;B. Spruck;G. X. Sun;J. F. Sun;S. S. Sun;Y. J. Sun;Y. Z. Sun;Z. J. Sun;Z. T. Sun;C. J. Tang;X. Tang;I. Tapan;E. H. Thorndike;M. Tiemens;D. Toth;M. Ullrich;I. Uman;G. S. Varner;B. Wang;B. L. Wang;D. Wang;D. Y. Wang;K. Wang;L. L. Wang;L. S. Wang;M. Wang;P. Wang;P. L. Wang;Q. J. Wang;S. G. Wang;W. Wang;X. F. Wang;Y. D. Wang;Y. F. Wang;Y. Q. Wang;Z. Wang;Z. G. Wang;Z. H. Wang;Z. Y. Wang;D. H. Wei;J. B. Wei;P. Weidenkaff;S. P. Wen;U. Wiedner;M. Wolke;L
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