https://doi.org/10.1140/epjc/s10052-007-0352-1
Regular Article - Theoretical Physics
Non-perturbative QCD effects and the top mass at the Tevatron
1
Theoretical Physics, MS106, Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL, 60510-0500, USA
2
Fachbereich C, Physik, Bergische Universität, Gaußstr. 20, 42097, Wuppertal, Germany
* e-mail: skands@fnal.gov
Received:
16
March
2007
Revised:
22
May
2007
Published online:
25
July
2007
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 δmtop ∼ ±0.5 GeV from non-perturbative uncertainties, and a further δmtop ∼ ±1 GeV from shower effects.
© Springer-Verlag , 2007