$a_0(980)$ photoproduction in the coupled channel model

TL;DR

This paper models the photoproduction of the scalar resonance a_0(980) using a coupled channel approach, providing predictions for mass distributions relevant to upcoming experiments at JLab.

Contribution

It introduces a coupled channel model for a_0(980) photoproduction including multiple intermediate states, offering detailed predictions for experimental observables.

Findings

Mass distribution predictions at E_gamma=7 GeV

Analysis of phase effects on mass distribution shape

Relevance for upcoming JLab experiments

Abstract

We calculated the coupled channel photoproduction amplitudes of the scalar isovector resononace $a_0(980)$, which include the $\pi\eta$, $K^+K^-$ and $K^0\overline{K^0}$ intermediate states. Based on them we obtained the mass distribution in the $\pi\eta$ channel at photon energy $E_\gamma$=7 GeV, corresponding to energy accissible in new JLab experiments CLAS12 and GlueX. We also analyzed the shape of mass distribution as a function of the phase of the background amplitude.