Investigating the inclusive $D^0$ photoproduction in ultraperipheral $PbPb$ collisions at the Large Hadron Collider

TL;DR

This paper investigates inclusive $D^0$ photoproduction in ultraperipheral $PbPb$ collisions at the LHC using the color dipole $S$-matrix approach, comparing models and data to enhance understanding of high-energy nuclear strong interactions.

Contribution

It introduces a comprehensive analysis of $D^0$ photoproduction using multiple models for the unintegrated gluon distribution and compares predictions with CMS data.

Findings

Predictions vary significantly between models, highlighting the importance of nuclear effects.

Comparison with CMS data constrains models of gluon distributions.

Results suggest the observable is key to understanding high-energy nuclear interactions.

Abstract

The inclusive $D^0$ photoproduction in $PbPb$ collisions at the center - of - mass energies of the Large Hadron Collider (LHC) is investigated considering the color dipole $S$ - matrix approach. The analytical expressions for the differential distributions are derived in the impact parameter and transverse momentum spaces and predictions for the rapidity and transverse momentum distributions are presented considering three distinct models for the unintegrated gluon distribution of the nuclear target. In particular, we compare the predictions derived assuming a linear dynamics, with and without the inclusion of nuclear effects, with those obtained by solving the running coupling Balitsky - Kovchegov equation. A comparison of these predictions with the recent (preliminary) CMS data is also performed. Our results indicate that a detailed analysis of this observable will be very useful to improve our understanding of the strong interaction theory at high energies and in a nuclear medium.