Observation of a charged (DD*)± mass peak in e+ e- → πDD* at sqrt[s] = 4.26 GeV

M Ablikim; M N Achasov; O Albayrak; D J Ambrose; F F An; Q An; J Z Bai; R Baldini Ferroli; Y Ban; J Becker; J V Bennett; M Bertani; J M Bian; E Boger; O Bondarenko; I Boyko; S Braun; R A Briere; V Bytev; H Cai; X Cai; O Cakir; A Calcaterra; G F Cao; S A Cetin; J F Chang; G Chelkov; G 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 Dedovich; Z Y Deng; A Denig; I Denysenko; M Destefanis; W M Ding; Y Ding; L Y Dong; M Y Dong; S X Du; J Fang; S S Fang; L Fava; C Q Feng; P Friedel; C D Fu; J L Fu; O Fuks; Y Gao; C Geng; 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 P Guo; Y L Han; F A Harris; K L He; M He; Z Y He; T Held; Y K Heng; Z L Hou; C Hu; H M Hu; J F Hu; T Hu; G M Huang; G S Huang; J S Huang; L Huang; X T Huang; Y Huang; T Hussain; C S Ji; Q 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; N 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 L 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; X L 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; C L Liu; C X Liu; F H Liu; Fang Liu; Feng Liu; H B Liu; H H Liu; H M Liu; J P Liu; K 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; X R Lu; Y P Lu; C L Luo; M X Luo; T 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; 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 MoralesMorales; 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; H P Peng; K Peters; J L Ping; R G Ping; R Poling; E Prencipe; M Qi; S Qian; C F Qiao; L Q Qin; X S Qin; Y Qin; Z H Qin; J F Qiu; K H Rashid; C F Redmer; M Ripka; G Rong; X D 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; 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; D Toth; M Ullrich; I Uman; G S Varner; B 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; X F Wang; X L 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; Q G Wen; S P Wen; M Werner; U Wiedner; L H Wu; N Wu; S X Wu; W Wu; Z Wu; L G Xia; Y X Xia; Z J Xiao; Y G Xie; Q L Xiu; G F Xu; Q J Xu; Q N Xu; X P Xu; Z Xue; L Yan; W B Yan; W C Yan; Y H Yan; H X Yang; Y Yang; Y X Yang; Y Z Yang; H Ye; M Ye; M H Ye; B X Yu; C X Yu; H W Yu; J S 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; C Zhang; C B Zhang; C C Zhang; D H Zhang; H H Zhang; H Y Zhang; J L Zhang; J Q Zhang; J W Zhang; J Y Zhang; J Z Zhang; LiLi Zhang; S H Zhang; X J Zhang; X Y Zhang; Y Zhang; Y H Zhang; Z P Zhang; Z Y Zhang; Zhenghao Zhang; G Zhao; J W Zhao; Lei Zhao; Ling Zhao; M G Zhao; Q Zhao; S J Zhao; T C Zhao; X H Zhao; Y B Zhao; Z G Zhao; A Zhemchugov; B Zheng; J P Zheng; Y H Zheng; B Zhong; L Zhou; X Zhou; X K Zhou; X R Zhou; K Zhu; K J Zhu; X L Zhu; Y C Zhu; Y S Zhu; Z A Zhu; J Zhuang; B S Zou; J H Zou; (BESIII Collaboration)

doi:10.1103/PhysRevLett.112.022001

Observation of a charged (DD)± mass peak in e+ e- → πDD at sqrt[s] = 4.26 GeV

Phys Rev Lett. 2014 Jan 17;112(2):022001. doi: 10.1103/PhysRevLett.112.022001. Epub 2014 Jan 15.

Authors

M Ablikim¹, M N Achasov², O Albayrak³, D J Ambrose⁴, F F An¹, Q An⁵, J Z Bai¹, R Baldini Ferroli⁶, Y Ban⁷, J Becker⁸, J V Bennett⁹, M Bertani⁶, J M Bian¹⁰, E Boger¹¹, O Bondarenko¹², I Boyko¹¹, S Braun¹³, R A Briere³, V Bytev¹¹, H Cai¹⁴, X Cai¹, O Cakir¹⁵, A Calcaterra⁶, G F Cao¹, S A Cetin¹⁶, J F Chang¹, G Chelkov¹¹, G Chen¹, H S Chen¹, J C Chen¹, M L Chen¹, S J Chen¹⁷, X R Chen¹⁸, Y B Chen¹, H P Cheng¹⁹, X K Chu⁷, Y P Chu¹, D Cronin-Hennessy¹⁰, H L Dai¹, J P Dai¹, D Dedovich¹¹, Z Y Deng¹, A Denig²⁰, I Denysenko¹¹, M Destefanis²¹, W M Ding²², Y Ding²³, L Y Dong¹, M Y Dong¹, S X Du²⁴, J Fang¹, S S Fang¹, L Fava²⁵, C Q Feng⁵, P Friedel⁸, C D Fu¹, J L Fu¹⁷, O Fuks¹¹, Y Gao²⁶, C Geng⁵, K Goetzen²⁷, W X Gong¹, W Gradl²⁰, M Greco²¹, M H Gu¹, Y T Gu²⁸, Y H Guan²⁹, A Q Guo³⁰, L B Guo³¹, T Guo³¹, Y P Guo³⁰, Y L Han¹, F A Harris³², K L He¹, M He¹, Z Y He³⁰, T Held⁸, Y K Heng¹, Z L Hou¹, C Hu³¹, H M Hu¹, J F Hu¹³, T Hu¹, G M Huang³³, G S Huang⁵, J S Huang³⁴, L Huang¹, X T Huang²², Y Huang¹⁷, T Hussain³⁵, C S Ji⁵, Q Ji¹, Q P Ji³⁰, X B Ji¹, X L Ji¹, L L Jiang¹, X S Jiang¹, J B Jiao²², Z Jiao¹⁹, D P Jin¹, S Jin¹, F F Jing²⁶, N Kalantar-Nayestanaki¹², M Kavatsyuk¹², B Kloss²⁰, B Kopf⁸, M Kornicer³², W Kuehn¹³, W Lai¹, J S Lange¹³, M Lara⁹, P Larin³⁶, M Leyhe⁸, C H Li¹, Cheng Li⁵, Cui Li⁵, D L Li³⁷, D M Li²⁴, F Li¹, G Li¹, H B Li¹, J C Li¹, K Li³⁸, Lei Li¹, N Li²⁸, P R Li²⁹, Q J Li¹, W D Li¹, W G Li¹, X L Li²², X N Li¹, X Q Li³⁰, X R Li³⁹, Z B Li⁴⁰, H Liang⁵, Y F Liang⁴¹, Y T Liang¹³, G R Liao²⁶, D X Lin³⁶, B J Liu¹, C L Liu³, C X Liu¹, F H Liu⁴², Fang Liu¹, Feng Liu³³, H B Liu²⁸, H H Liu⁴³, H M Liu¹, J P Liu¹⁴, K Liu²⁶, K Y Liu²³, P L Liu²², Q Liu²⁹, S B Liu⁵, X Liu¹⁸, Y B Liu³⁰, Z A Liu¹, Zhiqiang Liu¹, Zhiqing Liu¹, H Loehner¹², X C Lou¹, G R Lu³⁴, H J Lu¹⁹, J G Lu¹, X R Lu²⁹, Y P Lu¹, C L Luo³¹, M X Luo⁴⁴, T Luo³², X L Luo¹, M Lv¹, F C Ma²³, H L Ma¹, Q M Ma¹, S Ma¹, T Ma¹, X Y Ma¹, F E Maas³⁶, M Maggiora²¹, Q A Malik³⁵, Y J Mao⁷, Z P Mao¹, J G Messchendorp¹², J Min¹, T J Min¹, R E Mitchell⁹, X H Mo¹, H Moeini¹², C MoralesMorales³⁶, K Moriya⁹, N Yu Muchnoi², H Muramatsu⁴, Y Nefedov¹¹, I B Nikolaev², Z Ning¹, S Nisar⁴⁵, S L Olsen³⁹, Q Ouyang¹, S Pacetti⁴⁶, J W Park³², M Pelizaeus⁸, H P Peng⁵, K Peters²⁷, J L Ping³¹, R G Ping¹, R Poling¹⁰, E Prencipe²⁰, M Qi¹⁷, S Qian¹, C F Qiao²⁹, L Q Qin²², X S Qin¹, Y Qin⁷, Z H Qin¹, J F Qiu¹, K H Rashid³⁵, C F Redmer²⁰, M Ripka²⁰, G Rong¹, X D Ruan²⁸, A Sarantsev, S Schumann²⁰, W Shan⁷, M Shao⁵, C P Shen⁴⁷, X Y Shen¹, H Y Sheng¹, M R Shepherd⁹, W M Song¹, X Y Song¹, S Spataro²¹, B Spruck¹³, G X Sun¹, J F Sun³⁴, S S Sun¹, Y J Sun⁵, Y Z Sun¹, Z J Sun¹, Z T Sun⁵, C J Tang⁴¹, X Tang¹, I Tapan⁴⁸, E H Thorndike⁴, D Toth¹⁰, M Ullrich¹³, I Uman¹⁶, G S Varner³², B Wang¹, D Wang⁷, D Y Wang⁷, K Wang¹, L L Wang¹, L S Wang¹, M Wang²², P Wang¹, P L Wang¹, Q J Wang¹, S G Wang⁷, X F Wang²⁶, X L Wang⁵, Y D Wang⁶, Y F Wang¹, Y Q Wang²⁰, Z Wang¹, Z G Wang¹, Z H Wang⁵, Z Y Wang¹, D H Wei⁴⁹, J B Wei⁷, P Weidenkaff²⁰, Q G Wen⁵, S P Wen¹, M Werner¹³, U Wiedner⁸, L H Wu¹, N Wu¹, S X Wu⁵, W Wu³⁰, Z Wu¹, L G Xia²⁶, Y X Xia³⁷, Z J Xiao³¹, Y G Xie¹, Q L Xiu¹, G F Xu¹, Q J Xu³⁸, Q N Xu²⁹, X P Xu⁵⁰, Z Xue¹, L Yan⁵, W B Yan⁵, W C Yan⁵, Y H Yan³⁷, H X Yang¹, Y Yang³³, Y X Yang⁴⁹, Y Z Yang²⁸, H Ye¹, M Ye¹, M H Ye⁵¹, B X Yu¹, C X Yu³⁰, H W Yu⁷, J S Yu¹⁸, S P Yu²², C Z Yuan¹, W L Yuan¹⁷, Y Yuan¹, A A Zafar³⁵, A Zallo⁶, S L Zang¹⁷, Y Zeng³⁷, B X Zhang¹, B Y Zhang¹, C Zhang¹⁷, C B Zhang³⁷, C C Zhang¹, D H Zhang¹, H H Zhang⁴⁰, H Y Zhang¹, J L Zhang¹, J Q Zhang¹, J W Zhang¹, J Y Zhang¹, J Z Zhang¹, LiLi Zhang³⁷, S H Zhang¹, X J Zhang¹, X Y Zhang²², Y Zhang¹, Y H Zhang¹, Z P Zhang⁵, Z Y Zhang¹⁴, Zhenghao Zhang³³, G Zhao¹, J W Zhao¹, Lei Zhao⁵, Ling Zhao¹, M G Zhao³⁰, Q Zhao¹, S J Zhao²⁴, T C Zhao¹, X H Zhao¹⁷, Y B Zhao¹, Z G Zhao⁵, A Zhemchugov¹¹, B Zheng⁵², J P Zheng¹, Y H Zheng²⁹, B Zhong³¹, L Zhou¹, X Zhou¹⁴, X K Zhou²⁹, X R Zhou⁵, K Zhu¹, K J Zhu¹, X L Zhu²⁶, Y C Zhu⁵, Y S Zhu¹, Z A Zhu¹, J Zhuang¹, B S Zou¹, J H Zou¹; (BESIII Collaboration)

Affiliations

¹ Institute of High Energy Physics, Beijing 100049, People's Republic of China.
² G.I. Budker Institute of Nuclear Physics SB RAS (BINP), Novosibirsk 630090, Russia.
³ Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA.
⁴ University of Rochester, Rochester, New York 14627, USA.
⁵ University of Science and Technology of China, Hefei 230026, People's Republic of China.
⁶ INFN Laboratori Nazionali di Frascati, I-00044, Frascati, Italy.
⁷ Peking University, Beijing 100871, People's Republic of China.
⁸ Bochum Ruhr-University, D-44780 Bochum, Germany.
⁹ Indiana University, Bloomington, Indiana 47405, USA.
¹⁰ University of Minnesota, Minneapolis, Minnesota 55455, USA.
¹¹ Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia.
¹² KVI, University of Groningen, NL-9747 AA Groningen, Netherlands.
¹³ Universitaet Giessen, D-35392 Giessen, Germany.
¹⁴ WuhanUniversity, Wuhan 430072, People's Republic of China.
¹⁵ Ankara University, Dogol Caddesi, 06100 Tandogan, Ankara, Turkey.
¹⁶ Dogus University, 34722 Istanbul, Turkey.
¹⁷ Nanjing University, Nanjing 210093, People's Republic of China.
¹⁸ Lanzhou University, Lanzhou 730000, People's Republic of China.
¹⁹ Huangshan College, Huangshan 245000, People's Republic of China.
²⁰ Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany.
²¹ University of Turin, I-10125 Turin, Italy and INFN, I-10125 Turin, Italy.
²² Shandong University, Jinan 250100, People's Republic of China.
²³ Liaoning University, Shenyang 110036, People's Republic of China.
²⁴ Zhengzhou University, Zhengzhou 450001, People's Republic of China.
²⁵ University of Eastern Piedmont, I-15121 Alessandria, Italy and INFN, I-10125 Turin, Italy.
²⁶ Tsinghua University, Beijing 100084, People's Republic of China.
²⁷ GSI Helmholtzcentre for Heavy Ion Research GmbH, D-64291 Darmstadt, Germany.
²⁸ GuangXi University, Nanning 530004, People's Republic of China.
²⁹ University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China.
³⁰ Nankai University, Tianjin 300071, People's Republic of China.
³¹ Nanjing Normal University, Nanjing 210023, People's Republic of China.
³² University of Hawaii, Honolulu, Hawaii 96822, USA.
³³ Central China Normal University, Wuhan 430079, People's Republic of China.
³⁴ Henan Normal University, Xinxiang 453007, People's Republic of China.
³⁵ University of the Punjab, Lahore-54590, Pakistan.
³⁶ Helmholtz Institute Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany.
³⁷ Hunan University, Changsha 410082, People's Republic of China.
³⁸ Hangzhou Normal University, Hangzhou 310036, People's Republic of China.
³⁹ Seoul National University, Seoul 151-747, Korea.
⁴⁰ Sun Yat-Sen University, Guangzhou 510275, People's Republic of China.
⁴¹ Sichuan University, Chengdu 610064, People's Republic of China.
⁴² Shanxi University, Taiyuan 030006, People's Republic of China.
⁴³ Henan University of Science and Technology, Luoyang 471003, People's Republic of China.
⁴⁴ Zhejiang University, Hangzhou 310027, People's Republic of China.
⁴⁵ COMSATS Institute of Information Technology, Lahore, Defence Road, Off Raiwind Road, 54000 Lahore, Pakistan.
⁴⁶ INFN and University of Perugia, I-06100, Perugia, Italy.
⁴⁷ Beihang University, Beijing 100191, People's Republic of China.
⁴⁸ Uludag University, 16059 Bursa, Turkey.
⁴⁹ Guangxi Normal University, Guilin 541004, People's Republic of China.
⁵⁰ Seoul National University, Seoul 151-747, Korea and Soochow University, Suzhou 215006, People's Republic of China.
⁵¹ China Center of Advanced Science and Technology, Beijing 100190, People's Republic of China.
⁵² University of South China, Hengyang 421001, People's Republic of China.

PMID: 24484002
DOI: 10.1103/PhysRevLett.112.022001

Abstract

We report on a study of the process e+ e- → π± (DD*)∓ at sqrt[s] = 4.26 GeV using a 525 pb(-1) data sample collected with the BESIII detector at the BEPCII storage ring. A distinct charged structure is observed in the (DD*)∓ invariant mass distribution. When fitted to a mass-dependent-width Breit-Wigner line shape, the pole mass and width are determined to be Mpole = (3883.9±1.5(stat)±4.2(syst)) MeV/c2 and Γpole = (24.8±3.3(stat)±11.0(syst)) MeV. The mass and width of the structure, which we refer to as Zc(3885), are 2σ and 1σ, respectively, below those of the Zc(3900) → π± J/ψ peak observed by BESIII and Belle in π+ π- J/ψ final states produced at the same center-of-mass energy. The angular distribution of the πZc(3885) system favors a JP = 1+ quantum number assignment for the structure and disfavors 1- or 0-. The Born cross section times the DD* branching fraction of the Zc(3885) is measured to be σ(e+ e- → π± Zc(3885)∓)×B(Zc(3885)∓ → (DD*)∓) = (83.5±6.6(stat)±22.0(syst)) pb. Assuming the Zc(3885) → DD* signal reported here and the Zc(3900) → πJ/ψ signal are from the same source, the partial width ratio (Γ(Zc(3885) → DD*)/Γ(Zc(3900) → πJ/ψ)) = 6.2±1.1(stat)±2.7(syst) is determined.