Calibration of the top quark mass for Monte-Carlo event generators
- Autor(en)
- Mathias Butenschön, Bahman Dehnadi, André H. Hoang, Vicent Mateu, Moritz Preisser, Iain W. Stewart
- Abstrakt
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. Due to the complicated interplay of hadronization and parton shower dynamics in Monte Carlo event generators, relating m
t
MC 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 m
t
MC agrees with the MSR mass at the scale 1 GeV within uncertainties, m
t
MC ≃ m
t
MSR
1GeV, but differs from the pole mass by 900/600 MeV.
- Organisation(en)
- Teilchenphysik, Forschungsplattform Internationales Erwin Schrödinger Institut für Mathematik und Physik
- Externe Organisation(en)
- Massachusetts Institute of Technology, Universität Hamburg, Universität Siegen, Universidad Autónoma de Madrid
- Journal
- Proceedings of Science (PoS)
- Band
- 282
- Anzahl der Seiten
- 8
- DOI
- https://doi.org/10.22323/1.282.0698
- Publikationsdatum
- 04-2017
- ÖFOS 2012
- 103012 Hochenergiephysik
- Link zum Portal
- https://ucris.univie.ac.at/portal/de/publications/calibration-of-the-top-quark-mass-for-montecarlo-event-generators(4ace5945-70bd-460c-9243-7649a4e927a5).html