# The 12th International Workshop on the Physics of Excited Nucleons

10-14 June 2019
Bonn, Campus Poppelsdorf
Europe/Zurich timezone

## The Discussion of P₍ states and the prediction of J/ᴪ Photo-production

11 Jun 2019, 14:30
30m
HS 6

### HS 6

Baryon resonances in experiments with hadron beams and in the e+e- collisions

### Speaker

Jiajun Wu (University of Chinese Academy of Sciences)

### Description

We will provide the theoretical description of $P_c$ states within coupled channel model. To provide information for the search of nucleon resonances with hidden charm $P_c$ for the on-going experiments at JLab, we make predictions by including the resonant amplitude of $\gamma p \to N^*_{c\bar{c}} \to J/\psi p$ calculated from all available theoretical models. The background is mainly from Pomeron-exchange model of the $\gamma p \to J/\psi p$ reaction. The parameters of the Pomeron-exchange amplitudes are determined by fitting the total cross section data of $\gamma p \to J/\psi p$ up to very high energy W = 300 GeV. We then demonstrate that the $P_c$ can be most easily identified in the differential cross sections at large angles where the contribution of background becomes negligible.

### Primary authors

Jiajun Wu (University of Chinese Academy of Sciences) Prof. T.-S. Harry Lee ( Argonne National Laboratory) Bing-Song Zou (Chinese Academy of Sciences)