25-29 September 2017
Salamanca, Spain
Europe/Zurich timezone

## Heavy Quark Spin Symmetry Violating Hadronic Transitions of Higher Charmonia

29 Sep 2017, 10:25
20m
Aula 2.3

### Speaker

Mr Muhammad Naeem Anwar (Institute of Theoretical Physics, Chinese Academy of Sciences)

### Description

In heavy quarkonia, hadronic transitions serve as an enlightened probe for the structure and help to establish the understanding of light quark coupling with a heavy degree of freedom. Moreover, in recent years, hadronic transitions revealed remarkable discoveries to identify the new conventional heavy quarkonia and extracting useful information about the so called “XYZ” exotic states.

In this contribution, we present our predictions for the HQSS breaking hadronic transitions of higher $S$ and $D$ wave vector charmonia based on our recently proposed model (inspired by Nambu-Jona-Lasinio model) to create light meson(s) in heavy quarkonium transitions [1]. We also suggest spectroscopic quantum number ($n~^{2S+1}L_J$) assignments for several experimentally observed charmonium-like states. Invoked by the recent evidence of $e^+e^- \to \eta h_c$ at center-of-mass energy $\sqrt{s}= 4.358$ GeV at BESIII, we delve into the $Y(4360)$ through its HQSS breaking hadronic transitions. Our analysis indicates that it is most likely to be a $D$ wave dominant state. Our predictions provide useful references to determine the properties of higher charmonia in ongoing and forthcoming experiments.

[1] M. N. Anwar, Y. Lu and B.-S. Zou, Phys. Rev. D $\textbf{95}$, 2017 (In Press), arXiv:1612.05396 [hep-ph]

### Primary authors

Mr Muhammad Naeem Anwar (Institute of Theoretical Physics, Chinese Academy of Sciences) Prof. Bing-Song Zou (Institute of Theoretical Physics, Chinese Academy of Sciences)