Diffractive charmonium spectrum in high energy collisions in the basis light-front quantization approach

TL;DR

This paper uses a light-front quantization approach to compute and predict charmonium production in high-energy collisions, aligning well with experimental data without extra parameters.

Contribution

It introduces a novel method to predict charmonium yields across various high-energy collision types using light-front wavefunctions derived from an effective Hamiltonian.

Findings

Predicted charmonium production cross sections agree with experimental data.

Cross-section ratios are largely insensitive to model parameters.

Method enables comprehensive predictions without additional parameters.

Abstract

Using the charmonium light-front wavefunctions obtained by diagonalizing an effective Hamiltonian with the one-gluon exchange interaction and a confining potential inspired by light-front holography in the basis light-front quantization formalism, we compute production of charmonium states in diffractive deep inelastic scattering and ultra-peripheral heavy ion collisions within the dipole picture. Our method allows us to predict yields of all vector charmonium states below the open flavor thresholds in high-energy deep inelastic scattering, proton-nucleus and ultra-peripheral heavy ion collisions, without introducing any new parameters in the light-front wavefunctions. The obtained charmonium cross section is in reasonable agreement with experimental data at HERA, RHIC and LHC. We observe that the cross-section ratio $\sigma_{\Psi(2s)}/\sigma_{J/\Psi}$ reveals significant independence of model parameters.