Hadronization systematics and top mass reconstruction

Abstract

I discuss a few issues related to the systematic error on the top mass measurement at hadron colliders, due to hadronization effects. Special care is taken about the impact of bottom-quark fragmentation in top decays, especially on the reconstruction relying on final states with leptons and J/psi in the dilepton channel. I also debate the relation between the measured mass and its theoretical definition, and report on work in progress, based on the Monte Carlo simulation of fictitious top-flavoured hadrons, which may shed light on this issue and on the hadronization systematics.

arXiv comment7 pages, 2 figures, 1 table. Talk given at QCD@Work 2014, Giovinazzo, Italy, June 2014

References in corpus (24)

• PYTHIA 6.4 Physics and Manual
• PYTHIA 6.2 Physics and Manual
• A Brief Introduction to PYTHIA 8.1
• Matching NLO QCD computations with Parton Shower simulations: the POWHEG method
• HERWIG 6.5: an event generator for Hadron Emission Reactions With Interfering Gluons (including supersymmetric processes)
• Matching NLO QCD computations and parton shower simulations
• The total top quark pair production cross-section at hadron colliders through O(alpha_S^4)
• Higgs mass and vacuum stability in the Standard Model at NNLO
• Top-Quark Decay at Next-to-Next-to-Leading Order in QCD
• NLO QCD corrections to off-shell top-antitop production with leptonic decays at hadron colliders
• Is There a Significant Excess in Bottom Hadroproduction at the Tevatron?
• Inclusive Analysis of the b Quark Fragmentation Function in Z Decays at LEP
• Top Mass Measurements from Jets and the Tevatron Top-Quark Mass
• $O({\alpha }_s^2)$ corrections to fully-differential top quark decays
• Precise measurement of the b-quark fragmentation function in Z0 boson decays
• Top mass determination in leptonic final states with J/psi
• Ultraviolet Sensitivity in Higher Dimensions
• Bottom Quark Fragmentation in Top Quark Decay
• Soft-Gluon Resummation for Bottom Fragmentation in Top Quark Decay
• Determination of the top quark mass from leptonic observables
• Bottom-quark fragmentation: comparing results from tuned event generators and resummed calculations
• A Phenomenological Study of Bottom Quark Fragmentation in Top Quark Decay
• Jet Activity in t-tbar Events and Top Mass Reconstruction at Hadron Colliders
• Top Mass Measurement and Bottom Fragmentation at the LHC

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• Fragmentation Uncertainties in Hadronic Observables for Top-quark Mass Measurements