Understanding the production of quarks and gluons in high energy collisions and their evolution is a very active area of investigation. Monte carlo event generator PYTHIA8 uses the parton shower model to simulate such collisions and is optimized using experimental observations. Recent measurements of event shape variables and differential jet cross-sections in pp collisions at $surd{s} = 13, TeV$ at the Large Hadron Collider have been used to investigate further the parton shower model as used in PYTHIA8.
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