Top-quark mass interpretation from simulation of top-flavoured mesons

2026/07/27 by Gennaro Corcella, Alexander Lind
#hep-ph

paper · pdf

Abstract

The interpretation of the top quark mass measurements in terms of well-known field theory definitions has been the topic of a long-standing discussion. In this paper we reconsider this issue and simulate fictitious top-flavoured mesons, whose mass can be related to any top mass definition, such as the pole mass, by means of Heavy Quark Effective Theory. We explore final-state observables for top-pair production in e⁺e^- and hadron collisions, and relate the top mass in standard t t events to the pole mass extracted from top-meson samples simulated with Pythia 8.3. Our results are in agreement with the expectation of an uncertainty about 200-300 MeV, hence of the order of Λ_{\rm QCD}.

Citations

• Observation of a cross-section enhancement near the t t ¯ production threshold in s = 13 TeV pp collisions with the ATLAS detector
• Search for heavy pseudoscalar and scalar bosons decaying to a top quark pair in proton-proton collisions at √(s) = 13 TeV
• Observation of a pseudoscalar excess at the top quark pair production threshold
• Toponium Hunter's Guide
• Herwig 7.3 Release Note
• Top Quark Mass Calibration for Monte Carlo Event Generators -- An Update
• A comprehensive guide to the physics and usage of PYTHIA 8.3
• The top-quark mass: challenges in definition and determination
• The Top Mass in Hadronic Collisions
• Theory Summary
• Heavy-Quark Effective Theory

Related

• Interpretation of the top-quark mass measurements: a theory overview
• The Top Mass: Interpretation and Theoretical Uncertainties
• The top-quark mass: challenges in definition and determination
• Top-quark mass measurements: review and perspectives
• Top-quark Pair Production in a Running Mass Scheme