Exclusive open-charm near-threshold cross sections in a coupled-channel approach

TL;DR

This paper analyzes open-charm production data near threshold using a coupled-channel model, successfully describing line shapes and extracting resonance parameters across a wide energy range.

Contribution

It introduces a coupled-channel approach to simultaneously fit open-charm data, providing new insights into vector charmonium resonances.

Findings

Good fit to experimental line shapes

Extraction of parameters for 5 vector charmonium states

Comprehensive description across 3.7 to 4.7 GeV

Abstract

Data on open-charm channels collected by the Belle Collaboration are analysed simultaneously using a unitary approach based on a coupled-channel model in a wide energy range $\sqrt{s}=3.7\div 4.7$ GeV. The resulting fit provides a remarkably good overall description of the line shapes in all studied channels. Parameters of 5 vector charmonium resonances are extracted from the fit.