Top Quark Mass Calibration for Monte Carlo Event Generators

2016/08/03 by Mathias Butenschoen, Bahman Dehnadi, André H. Hoang +4
Physics and Astronomy · #Calibration #Event (particle physics) #Event generator #Hadron #Hadronization #Monte Carlo method #Neutrino Physics Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Top quark #hep-ex #hep-ph

paper · pdf · doi:10.1103/physrevlett.117.232001

published as Phys. Rev. Lett. 117, 232001 (2016) · 6 pages, 3 figures

arxiv created 2016/08/03 · openalex created_date 2016/08/23 · openalex publication_date 2016/11/29 · arxiv updated 2016/12/07 · openalex updated_date 2026/08/05

Abstract

The most precise top quark mass measurements use kinematic reconstruction methods, determining the top mass parameter of a Monte Carlo event generator m_t^MC. Because of hadronization and parton-shower dynamics, relating m_t^MC to a field theory mass is difficult. We present a calibration procedure to determine this relation using hadron level QCD predictions for observables with kinematic mass sensitivity. Fitting e⁺e^- 2-jettiness calculations at next-to-leading-logarithmic and next-to-next-to-leading-logarithmic order to pythia 8.205, m_t^MC differs from the pole mass by 900 and 600 MeV, respectively, and agrees with the MSR mass within uncertainties, m_t^MC≃m_{t,1 GeV}^MSR.

Citations

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