Non-perturbative QCD Effects and the Top Mass at the Tevatron

Preprint

7 March 2007

preprint
Published by arXiv in arXiv

Abstract

We present a new, universally applicable toy model of colour reconnections in hadronic final states. The model is based on hadronising strings and has one free parameter. We next present an implementation of this model in the Pythia event generator and provide several parameter sets ("tunes"), constrained by fits to Tevatron minimum-bias data. Finally, we consider the sensitivity of a simplified top mass analysis to these effects, in exclusive semi-leptonic top events at the Tevatron. A first attempt at isolating the genuine non-perturbative effects gives an estimate of order delta(m_top) ~ 0.5 GeV from non-perturbative uncertainties, and a further delta(m_top) ~ 1 GeV from shower effects.

Keywords

PERTURBATIVE QCD
UNCERTAINTIES
MASS ANALYSIS
QCD EFFECTS
TEVATRON
TOP MASS
SHOWER
DELTA
M_TOP

All Related Versions

Version 1, 2007-03-07, ArXiv
Version 2, 2008-04-24, ArXiv
Version 1, 2008-07-21, ArXiv (Unconfirmed version)
Published version: The European Physical Journal C, 52 (1), 133.

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