Heavy-flavor production in pp and heavy-ion collisions in QCD up-to-LHC energies

Abstract

Charm production in pp collisions is considered in the framework of perturbative QCD. The values of two parameters, the charm quark mass m c and the QCD scale µ 2 , are determined from the comparison of the theoretical calculations with experimental data. The RHIC data on charm and beauty production are compared with the k T -factorization approach predictions and with standard NLO QCD. The calculated results underestimate the STAR Collaboration data. The role of possible nuclear effects is discussed. The predictions for LHC energies are also given.

Open charm production in p + p and Pb + Pb collisions at the CERN Large Hadron Collider

“…String fusion and percolation effects on heavy flavour production have also been discussed in refs. [70,71] at RHIC and LHC energies. The production pattern for heavy quarks in both of these nonperturbative approaches becomes similar to that of the light quarks via the Schwinger mechanism [35] and result on an expected enhancement of heavy quark pairs QQ ¯.…”