Production of charm quark/antiquark pairs at LHC

Understand

We discuss charm production at LHC.

• The production of single $c \bar c$ pairs is calculated in the $k_t$-factorization approach.
• We use several unintegrated gluon distributions from the literature.
• The hadronization is included with the help of fragmentation functions found for the production of charmed mesons in $e^+ e^-$ collisions.