D-meson production in high energy pA collisions within the QCD color dipole transverse momentum representation

The D-meson production is investigated by considering the unintegrated gluon distribution within the dipole approach in the momentum representation. We analyze the D-meson spectrum accounting for the effects of nonlinear behavior of the QCD dynamics which can be accordingly addressed in the dipole framework. The unintegrated gluon distribution is obtained by using geometric scaling property and the results are compared to the Glauber-Gribov framework. The absolute transverse momentum spectra and the nuclear modification ratios are investigated. Predictions are compared with the experimental measurements by the ALICE and LHCb Collaborations in pA collisions for different rapidity bins.

Automated summary

The production of D mesons is investigated by analyzing the unintegrated gluon distribution and the effects of nonlinear QCD dynamics. The results show that the unintegrated gluon distribution obtained by using geometric scaling property has a better fit compared to the Glauber-Gribov framework, and has good predictive capability for the D meson spectrum and nuclear modification ratios.