Charm production in the semi-hard approach of QCD and the unintegrated gluon distribution

TL;DR

This paper analyzes D^* meson production at HERA energies using semi-hard QCD with unintegrated gluon densities, demonstrating good agreement with experimental data and providing predictions based on the CCFM evolution equation.

Contribution

It introduces a consistent analysis of D^* production using universal unintegrated gluon densities with BFKL behavior and applies the CCFM evolution equation for predictions.

Findings

Good description of D^* data at HERA

Predictions align with experimental results

Supports the semi-hard QCD approach

Abstract

In the framework of semi-hard QCD approach, we present a consistent analysis of D^* meson production at HERA energies. The consideration is based on universal unintegrated gluon densities, which have BFKL behavior in the small x region. Predictions of the CCFM evolution equation for D^* production are obtained and show a good description of D^* data at HERA.