Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/29073
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Type: | Conference paper |
Title: | Gluons, quarks, and the transition from nonperturbative to perturbative QCD |
Author: | Williams, A. |
Citation: | Proceedings of the Workshop on Lepton Scattering, Hadrons and QCD, Adelaide, Australia, 26 March-6 April 2001 / W. Melnitchouk ... [et al.] (eds.): pp.138-145 |
Publisher: | WORLD SCIENTIFIC PUBLISHING CO PTE LTD |
Publisher Place: | SINGAPORE |
Issue Date: | 2001 |
ISBN: | 9810247494 |
Conference Name: | Workshop on Lepton Scattering, Hadrons and QCD (2001 : Adelaide, South Australia) |
Editor: | Melnitchouk, W. Schreiber, A. Thomas, A. Tandy, P. |
Statement of Responsibility: | Anthony G. Williams |
Abstract: | Lattice-based investigations of two fundamental QCD quantities are described, namely the gluon and quark propagators in Landau gauge. We have studied the Landau gauge gluon propagator using a variety of lattices with spacings from a = 0.17 to 0.41 fm. We demonstrate that it is possible to obtain scaling behavior over a very wide range of momenta and lattice spacings and to explore the infinite volume and continuum limits. These results confirm that the Landau gauge gluon propagator is infrared finite. We study the Landau gauge quark propagator in quenched QCD using two forms of the O(a)-improved propagator and we find good agreement between these. The extracted value of the infrared quark mass in the chiral limit is found to be 300 +/- 30 MeV. We conclude that the momentum regime where the transition from nonperturbative to perturbative QCD occurs is Q^2 approx 4GeV^2. |
Description: | Copyright © 2001. Submitted to Cornell University’s online archive www.arXiv.org in 2001 by Dr. Anthony G. Williams. Post-print sourced from www.arxiv.org. |
DOI: | 10.1142/9789812799708_0017 |
Published version: | http://arxiv.org/abs/hep-ph/0107029 |
Appears in Collections: | Aurora harvest 6 Special Research Centre for the Subatomic Structure of Matter publications |
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hdl_29073.pdf | 493.41 kB | Publisher's post-print | View/Open |
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