Optimizing the parton shower model in PYTHIA with pp collision data at $\sqrt{s}$ = 13 TeV

Abstract

Production of quarks and gluons in hadron collisions tests Quantum Chromodynamics (QCD) over a wide range of energy. Models of QCD are implemented in event generators to simulate hadron collisions and evolution of quarks and gluons into jets of hadrons. PYTHIA8 uses the parton shower model for simulating particle collisions and is optimized using experimental observations. Recent measurements of event shape variables and jet cross-sections in pp collisions at $\sqrt{s}$ = 13 TeV at the Large Hadron Collider have been used to optimize the parton shower model as used in PYTHIA8.

arXiv commentPythia8 event generator is optimized using recent experimental observations. Pythia8 with the optimized parameters shows better agreement with data. This study suggests that the models related to initial and final state radiations in Pythia8 can be improved with these new sets of parameters(Given in Table 1)

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