Top Quark Modeling and Generators in CMS
Efe Yazgan (for the CMS Collaboration)
TL;DR
This paper summarizes recent CMS top quark event modeling studies, introduces a new approach for parton shower uncertainties, and discusses optimized simulation tunes with improved theoretical consistency.
Contribution
It presents a new factorized method for estimating parton shower uncertainties and introduces a top quark specific CMS tune with advanced color reconnection models.
Findings
Demonstrates a consistent choice of PDFs in matrix element and parton shower.
Introduces a new factorized approach for parton shower uncertainties.
Develops a top quark specific PYTHIA8 CMS tune.
Abstract
Recent top quark event modeling studies done using LHC proton-proton collision data collected with the CMS detector at centre of mass energies of 8 and 13 TeV and state-of-the-art theoretical predictions are summarized. A new factorized approach for parton shower uncertainties is presented. A top quark specific PYTHIA8 CMS tune, along with tunes using new color reconnection models, is discussed. The possibility of having a consistent choice of parton distribution function in the matrix element and the parton shower is demonstrated with tunes constructed with leading, next-to-leading, and next-to-next-to-leading order versions of NNPDF3.1 set compared to minimum bias and underlying event data.
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Taxonomy
TopicsParticle physics theoretical and experimental studies · High-Energy Particle Collisions Research · Superconducting Materials and Applications