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arXiv · 1608.01318

Top Quark Mass Calibration for Monte Carlo Event Generators

Mathias Butenschoen·Bahman Dehnadi·Andre H. Hoang·Vicent Mateu·Moritz Preisser·Iain W. Stewart
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Abstract

The most precise top quark mass measurements use kinematic reconstruction methods, determining the top mass parameter of a Monte Carlo event generator, $m_t^{\rm MC}$. Due to hadronization and parton shower dynamics, relating $m_t^{\rm MC}$ 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 NLL/NNLL order to Pythia 8.205, $m_t^{\rm MC}$ differs from the pole mass by $900$/$600$ MeV, and agrees with the MSR mass within uncertainties, $m_t^{\rm MC}\simeq m_{t,1\,{\rm GeV}}^{\rm MSR}$.

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Mathias Butenschoen, Bahman Dehnadi, Andre H. Hoang, Vicent Mateu, Moritz Preisser, Iain W. Stewart. 2016-08-03. Top Quark Mass Calibration for Monte Carlo Event Generators. https://doi.org/10.1103/physrevlett.117.232001

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