Zero temperature string breaking in lattice quantum chromodynamics

Claude Bernard, Thomas DeGrand, Carleton DeTar, Pierre Lacock, Steven Gottlieb, Urs M. Heller, James Hetrick, Kostas Orginos, Doug Toussaint, Robert L. Sugar

Research output: Contribution to journalArticlepeer-review

37 Scopus citations


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 a clear confirmation of string breaking.

Original languageEnglish (US)
Article number074509
JournalPhysical Review D
Issue number7
StatePublished - 2001

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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