UNI-MB - logo
UMNIK - logo
 
E-viri
Recenzirano Odprti dostop
  • Cross section measurement o...
    Achasov, M. N.; Ahmed, S.; Amoroso, A.; Ban, Y.; Cai, X.; Calcaterra, A.; Chen, H. S.; Chen, Z. J.; De Mori, F.; Fava, L.; Felici, G.; Greco, M.; Gu, L. M.; Hao, X. Q.; He, K. L.; Himmelreich, M.; Hou, Z. L.; Hu, H. M.; Hu, T.; Ikegami Andersson, W.; Janchiv, S.; Jiang, X. S.; Jiao, Z.; Jin, Y.; Jing, M. Q.; Kliemt, R.; Kupsc, A.; Kurth, M. G.; Lavezzi, L.; Leithoff, H.; Lellmann, M.; Li, C.; Li, F.; Li, J. Q.; Li, W. D.; Liao, G. R.; Liu, B. J.; Liu, Feng; Liu, S. B.; Liu, X.; Liu, Y. B.; Luo, M. X.; Luo, T.; Lyu, X. R.; Maldaner, S.; Meng, Z. X.; Min, T. J.; Mitchell, R. E.; Mo, Y. J.; Muramatsu, H.; Nakhoul, S.; Nerling, F.; Nisar, S.; Pan, X.; Qi, T. Y.; Qin, Z. H.; Qiu, J. F.; Redmer, C. F.; Rolo, M.; Schelhaas, Y.; Schnier, C.; Shen, C. P.; Shi, H. C.; Sosio, S.; Spataro, S.; Su, P. P.; Sun, Z. T.; Tan, Y. X.; Tang, C. J.; Tang, J.; Wang, C. W.; Wang, D. Y.; Wang, W. H.; Wang, W. P.; Wolke, M.; Wollenberg, L.; Xing, T. Y.; Xu, Y. C.; Yan, Xu; Yang, Zhi; Ye, M. H.; You, Z. Y.; Yu, T.; Zeng, Y.; Zhang, Guangyi; Zhang, H. H.; Zhang, J. J.; Zhang, Jiawei; Zhang, L. Q.; Zhang, Lei; Zhang, S.; Zhang, X. Y.; Zhao, Ling; Zhao, Q.; Zhemchugov, A.; Zheng, Y.; Zheng, Y. H.; Zhou, X. R.; Zhu, K.; Zou, J. H.

    Physical review. D, 09/2021, Letnik: 104, Številka: 5
    Journal Article

    Using data samples with a total integrated luminosity of 20.1 fb−1 collected by the BESIII detector operating at the BEPCII collider, the cross section of the process e+ e− → π+ π− ψ ( 3686 ) is measured at center-of-mass energies between 4.0076 and 4.6984 GeV. The measured cross section is consistent with previous results, and with much improved precision. A fit to the measured energy-dependent cross section, which includes three Breit-Wigner functions and a nonresonant contribution, confirms the existence of the charmonium-like states Y (4220), Y (4390), and Y (4660). This is the first observation of the Y (4660) at the BESIII experiment.