Spectroscopy and Decay Properties of Excited Charmonium States

TL;DR

This paper studies excited charmonium states using a potential model, identifying new resonances and predicting properties of higher states, contributing to understanding heavy quarkonium spectroscopy.

Contribution

It introduces a nonrelativistic potential model with screening effects to analyze charmonium spectra and decay properties, identifying new resonances and predicting higher state characteristics.

Findings

Identification of $X(4160)$ as $3^3P_0$

Identification of $Y(4500)$ as $3^3D_1$

Prediction of masses and widths for higher excited states

Abstract

In this work, we investigate the mass spectra of excited charmonia employing a nonrelativistic potential model with screening effect, and analyze their two-body strong decay, two-photon decay, leptonic decay, and hadronic transitions. Especially, we find that the newly observed resonances $X(4160)$, $Y(4500)$, and $Y(4710)$ can be identified as $3^3P_0$, $3^3D_1$, and $4^3D_1$ states, respectively. We also predict the masses and the widths of higher excited states in the charmonia family.