Search for Vector Charmonium(-like) States in $e^+e^- \to \omega \chi _{cJ}$

Zhang, Jielei (College of Physics and Electronic Engineering, Xinyang Normal University, Xinyang 464000, People's Republic of China) ; Yuan, Limin (College of Physics and Electronic Engineering, Xinyang Normal University, Xinyang 464000, People's Republic of China)

03 October 2018

Abstract: The cross sections of $e^+e^- \to \omega\chi_{cJ(J=0,1,2)}$ have been measured by BESIII. We try to search for vector charmonium(-like) states $Y(4220)$, $Y(4360)$, $\psi(4415)$ and $Y(4660)$ in the $e^+e^- \to \omega\chi_{cJ(J=0,1,2)}$ line shapes. The $\omega\chi_{c0}$ mainly comes from $Y(4220)$, $\omega\chi_{c1}$ mainly comes from $Y(4660)$ and $\omega\chi_{c2}$ mainly comes from $\psi(4415)$, maybe partly comes from $Y(4360)$ or $Y(4660)$. For the charmonium(-like) states that are not significant in the $e^+e^- \to \omega\chi_{cJ(J=0,1,2)}$ line shape, we also give the 90\% confidence level upper limits on the electron partial width multiplied by branching fraction. These results are helpful to study the nature of charmonium(-like) states in this energy region.


Published in: Acta Physica Polonica B 49 (2018) 1629-1636
Published by: Jagiellonian University
DOI: 10.5506/APhysPolB.49.1629
arXiv: 1808.07775
License: CC-BY-4.0



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