First results on the running coupling in QCD with two massless flavours
High Energy Physics - Lattice
2008-11-26 v2 High Energy Physics - Phenomenology
Abstract
We report on the non-perturbative computation of the running coupling of two-flavour QCD in the Schr"odinger functional scheme. The corresponding Lambda-parameter, which describes the coupling strength at high energy, is related to a low energy scale which still remains to be connected to a hadronic ``experimentally'' observable quantity. We find the non-perturbative evolution of the coupling indispensable to avoid untolerable errors in the estimated Lambda-parameter.
Keywords
Cite
@article{arxiv.hep-lat/0105003,
title = {First results on the running coupling in QCD with two massless flavours},
author = {Achim Bode and Roberto Frezzotti and Bernd Gehrmann and Martin Hasenbusch and Jochen Heitger and Karl Jansen and Stefan Kurth and Juri Rolf and Hubert Simma and Stefan Sint and Rainer Sommer and Peter Weisz and Hartmut Wittig and Ulli Wolff},
journal= {arXiv preprint arXiv:hep-lat/0105003},
year = {2008}
}
Comments
14 pages, 5 figures, 3 tables, some changes in the data analysis after discovery and correction of an error in Nucl. Phys. B 525, 387 (1998) by C. Christou et al. (hep-lat/9801007v2, Erratum to appear)