Zero temperature string breaking in lattice quantum chromodynamics
High Energy Physics - Lattice
2008-11-26 v2
Abstract
The separation of a heavy quark and antiquark pair leads to the formation of a tube of flux, or "string", which should break in the presence of light quark-antiquark pairs. This expected zero-temperature phenomenon has proven elusive in simulations of lattice QCD. We study mixing between the string state and the two-meson decay channel in QCD with two flavors of dynamical sea quarks. We confirm that mixing is weak and find that it decreases at level crossing. While our study does not show direct effects of internal quark loops, our results, combined with unitarity, give clear confirmation of string breaking.
Keywords
Cite
@article{arxiv.hep-lat/0103012,
title = {Zero temperature string breaking in lattice quantum chromodynamics},
author = {C. Bernard and T. DeGrand and C. DeTar and S. Gottlieb and U. M. Heller and J. Hetrick and P. Lacock and K. Orginos and R. L. Sugar and D. Toussaint},
journal= {arXiv preprint arXiv:hep-lat/0103012},
year = {2008}
}
Comments
20 pages, 7 figures. With small clarifications and two additions to references. Submitted to Phys. Rev. D