Authors
M Ablikim, MN Achasov, O Albayrak, DJ Ambrose, FF An, Q An, JZ Bai, R Baldini Ferroli, Y Ban, J Becker, JV Bennett, M Bertani, JM Bian, E Boger, O Bondarenko, I Boyko, S Braun, RA Briere, V Bytev, H Cai, X Cai, O Cakir, A Calcaterra, GF Cao, SA Cetin, JF Chang, G Chelkov, G Chen, HS Chen, JC Chen, ML Chen, SJ Chen, XR Chen, YB Chen, HP Cheng, XK Chu, YP Chu, D Cronin-Hennessy, HL Dai, JP Dai, D Dedovich, ZY Deng, A Denig, I Denysenko, M Destefanis, WM Ding, Y Ding, LY Dong, MY Dong, SX Du, J Fang, SS Fang, L Fava, CQ Feng, P Friedel, CD Fu, JL Fu, O Fuks, Y Gao, C Geng, K Goetzen, WX Gong, W Gradl, M Greco, MH Gu, YT Gu, YH Guan, AQ Guo, LB Guo, T Guo, YP Guo, YL Han, FA Harris, KL He, M He, ZY He, T Held, YK Heng, ZL Hou, C Hu, HM Hu, JF Hu, T Hu, GM Huang, GS Huang, JS Huang, L Huang, XT Huang, Y Huang, T Hussain, CS Ji, Q Ji, QP Ji, XB Ji, XL Ji, LL Jiang, XS Jiang, JB Jiao, Z Jiao, DP Jin, S Jin, FF Jing, N Kalantar-Nayestanaki, M Kavatsyuk, B Kloss, B Kopf, M Kornicer, W Kuehn, W Lai, JS Lange, M Lara, P Larin, M Leyhe, CH Li, Cheng Li, Cui Li, DL Li, DM Li, F Li, G Li, HB Li, JC Li, K Li, Lei Li, N Li, PR Li, QJ Li, WD Li, WG Li, XL Li, XN Li, XQ Li, XR Li, ZB Li, H Liang, YF Liang, YT Liang, GR Liao, DX Lin, BJ Liu, CL Liu, CX Liu, FH Liu, Fang Liu, Feng Liu, HB Liu, HH Liu, HM Liu, JP Liu, K Liu
Publication date
2013/12/13
Journal
Physical review letters
Volume
111
Issue
24
Pages
242001
Publisher
American Physical Society
Description
We study 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 but with a different line shape. In the mass spectrum, a distinct structure, referred to as , is observed at . The carries an electric charge and couples to charmonium. A fit to the invariant mass spectrum, neglecting possible interferences, results in a mass of and a width of for the , where the first errors are statistical and the second systematic. The difference between the parameters of this structure and the observed in the final state is within , but whether they are the same state needs further investigation. No significant …
Scholar articles
M Ablikim, MN Achasov, O Albayrak, DJ Ambrose… - Physical review letters, 2013