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Inclusive heavy meson photoproduction in $pPb$ and $PbPb$ collisions

Victor P. Goncalves, Luana Santana, Wolfgang Schäfer

Abstract

The inclusive photoproduction of heavy mesons in ultraperipheral $pPb$ and $PbPb$ collisions at the LHC energies is investigated considering the color dipole $S$-matrix formalism and assuming distinct models for the unintegrated gluon distribution, based on different assumptions for the description of the QCD dynamics. In particular, predictions for the $B^0$-meson photoproduction are presented here for the first time. The study of the $D^0$-meson photoproduction is revisited by estimating the impact of the treatment of the heavy charm fragmentation on the predictions and extended for $pPb$ collisions. Moreover, the contribution associated with the $b \rightarrow D^0$ transition is estimated. Our results indicate that a future experimental analysis of the heavy meson photoproduction will provide important constrains on the description of the hadronic structure at high energies.

Inclusive heavy meson photoproduction in $pPb$ and $PbPb$ collisions

Abstract

The inclusive photoproduction of heavy mesons in ultraperipheral and collisions at the LHC energies is investigated considering the color dipole -matrix formalism and assuming distinct models for the unintegrated gluon distribution, based on different assumptions for the description of the QCD dynamics. In particular, predictions for the -meson photoproduction are presented here for the first time. The study of the -meson photoproduction is revisited by estimating the impact of the treatment of the heavy charm fragmentation on the predictions and extended for collisions. Moreover, the contribution associated with the transition is estimated. Our results indicate that a future experimental analysis of the heavy meson photoproduction will provide important constrains on the description of the hadronic structure at high energies.
Paper Structure (8 sections, 10 equations, 9 figures, 2 tables)

This paper contains 8 sections, 10 equations, 9 figures, 2 tables.

Table of Contents

  1. Introduction
  2. Formalism
  3. Results
  4. Dependence on the fragmentation function
  5. $PbPb$ collisions
  6. $pPb$ collisions
  7. Inclusive $D^0$ photoproduction from bottom hadron decays
  8. Summary

Figures (9)

  • Figure 1: Inclusive heavy meson photoproduction in $pPb$ and $PbPb$ collisions.
  • Figure 2: Impact of the fragmentation function modeling on the transverse momentum (left panel) and rapidity (right panels) distributions for the inclusive $D^0$ (upper panels) and $B^0$ (lower panels) photoproduction in $PbPb$ collisions at $\sqrt{s} = 5.36$ TeV.
  • Figure 3: Comparison between the predictions derived assuming the Peterson and KKSS FF models and the recent CMS data CMS:2025jjx.
  • Figure 4: Rapidity distribution associated with the inclusive $D^0$ photoproduction in ultraperipheral $PbPb$ collisions at $\sqrt{s}=5.36$ TeV. Data from CMS collaboration CMS:2025jjx obtained considering distint bins in the meson transverse momentum. Theoretical predictions were derived considering distinct models for the nuclear UGD and for the description of the electromagnetic dissociation.
  • Figure 5: Transverse momentum distributions for the inclusive $D^0$ photoproduction in $PbPb$ collisions. Preliminary data from ALICE Collaboration Nese:2025ohz. Dependencies on the nuclear UGD (left panel) and on the description of the electromagnetic dissociation (right panel).
  • ...and 4 more figures