"Professor2" Package for Tuning the Parameters of Fragmentation Process in e+e- Annihilation

The verification scheme in the package "Professor2" for setting parameters of the most used physics generator PYTHIA8.2 for simulating the processes in high energy physics is described. The goal is to tune the PYTHIA8.2 parameter list for the fragmentation process below the production threshold. As an initial parameter list, we use the Belle (predecessor of the Belle II experiment) default parameter settings for fragmentation. For the MC pseudo-data, we use the Belle II software package i.e. basf2, and generator script developed by the main author of this paper. To validate the whole procedure, we use momentum distribution of charged pions and kaons to tune two free parameters of the fragmentation model in PYTHIA8 i.e. LUND fragmentation model. We demonstrate that the Professor2 package is a handful to perform multi-parameter tunes simultaneously.