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

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

2007-03-07

arxiv.org/abs/hep-ph/0703081v2

Eur.Phys.J.C52:133-140,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

7 pages

Scientific paper

10.1140/epjc/s10052-007-0352-1

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.

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