2017/08/02 by J. Mo, Jonathan Mo, Frank J. Tackmann +1 · 31 citations
Physics and Astronomy · #Gluon #Hadronization #High-Energy Particle Collisions Research #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Parton #Physics #Quantum Chromodynamics and Particle Interactions #Quark #hep-ex #hep-ph
paper · pdf · doi:10.1140/epjc/s10052-017-5365-9
published in The European Physical Journal C 77(11), 770 (Springer Science+Business Media) · 10 pages, 5 figures
arxiv created 2017/08/02 · openalex created_date 2017/08/17 · openalex publication_date 2017/11/01 · arxiv updated 2017/12/06 · openalex updated_date 2026/08/05
Predictions for our ability to distinguish quark and gluon jets vary by more than a factor of two between different parton showers. We study this problem using analytic resummed predictions for the thrust event shape up to NNLL ' using e+e- → Z → q q and e+e- → H → gg as proxies for quark and gluon jets. We account for hadronization effects through a nonperturbative shape function, and include an estimate of both perturbative and hadronization uncertainties. In contrast to previous studies, we find reasonable agreement between our results and predictions from both Pythia and Herwig parton showers. We find that this is due to a noticeable improvement in the description of gluon jets in the newest Herwig 7.1 compared to previous versions.