Prospects for observing the missing $2D$ and $1F$ charmonium states around 4 GeV

TL;DR

This paper analyzes the spectroscopic and decay properties of high-lying charmonium states around 4 GeV, providing predictions to aid future experimental searches at major facilities.

Contribution

It offers detailed theoretical predictions for the masses, decay widths, and radiative transitions of the $2D$ and $1F$ charmonium states, including unquenched effects.

Findings

Predicted masses and decay widths for $2D$ and $1F$ charmonium states.

Identified key radiative decay channels for experimental detection.

Provided guidance for future searches at BESIII, Belle II, LHCb, and STCF.

Abstract

Our understanding of high-lying states within the charmonium family remains incomplete, particularly in light of recent observations of charmonium states at energies around 4 GeV. In this study, we investigate the spectroscopic properties of several high-lying charmonia, focusing on the $2D$ and $1F$ states. A mass spectrum analysis is conducted, incorporating the unquenched effects. We then present a detailed study of the strong decay properties, including partial decay widths for two-body strong decays permitted by the Okubo-Zweig-Iizuka (OZI) rule. Additionally, we explore the primary radiative decay channels associated with these states. Finally, we discuss the radiative transitions of the $2D$ and $1F$ states via $e^+e^-$ annihilation. Theoretical predictions provided here aim to guide future experimental searches for high-lying charmonium states at facilities such as BESIII, Belle II, LHCb, and the future STCF.