Top quark mass calibration for Monte-Carlo event generators
- Author(s)
- Mathias Butenschoen, Bahman Dehnadi, André H. Hoang, Vicent Mateu, Moritz Preisser, Iain W. Stewart
- Abstract
The most precise top quark mass measurements use kinematic reconstruction methods, determining the top mass parameter of a Monte Carlo event generator, mMCt. Due to the complicated interplay of hadronization and parton shower dynamics in Monte Carlo event generators, relating mMCt to field theory masses is a non-trivial task. In this talk we present a calibration procedure to determine this relation using hadron level QCD predictions for 2-Jettiness in e+e- annihilation, an observable which has kinematic top mass sensitivity and has a close relation to the invariant mass of the particles coming from the top decay. The theoretical ingredients of the QCD prediction are explained. Fitting e+e- 2-Jettiness calculations at NLL/NNLL order to PYTHIA 8.205, we find that mMCt agrees with the MSR mass at the scale 1 GeV within uncertainties, mMCt ≃ mMSRt;1GeV, but differs from the pole mass by 900/600MeV.
- Organisation(s)
- Particle Physics, Research Platform Erwin Schrödinger International Institute for Mathematics and Physics
- External organisation(s)
- Universität Hamburg, Massachusetts Institute of Technology, Universidad Autónoma de Madrid
- Journal
- Proceedings of Science (PoS)
- Volume
- 265
- DOI
- https://doi.org/10.22323/1.265.0153
- Publication date
- 2016
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103034 Particle physics, 103012 High energy physics
- ASJC Scopus subject areas
- General
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/ea3ad79e-80c8-44d9-b14d-3f663b976905