Perturbative QCD Fragmentation Functions as a Phenomenological Model for Charm/Bottom Fragmentation

The perturbative QCD fragmentation functions can be applied phenomenologically as a model for charm and bottom quark fragmentation into heavy-light mesons. The predictions by this model on the observables $P_V$ and $⟨z⟩$ for $D-D^{\ast }$ and $B-B^{\ast }$ systems are compared with experimental data.