Speaker
Description
The talk addresses the interplay of perturbative and non-perturbative physics in Monte Carlo (MC) generators.
We summarize the studies carried out so far within the TMD parton branching (PB) approach on the extraction of intrinsic transverse momentum (intrinsic-kt) from Drell-Yan (DY) predictions at different center-of-mass energies and in different ranges of invariant mass of the lepton pair. The recent PB study shows a striking difference in the center-of-mass energy dependence of intrinsic-kt compared to standard Monte Carlo (MC) generators: whereas the PB approach finds basically no energy dependence, the standard MCs show a strong dependence. This difference can be associated with the radiation modelling and with the interplay of the effects related to soft-gluon emission and intrinsic-kt distribution. We comment on the possibility of the flavor dependence of the intrinsic-kt distribution.
