Zero temperature string breaking in lattice quantum chromodynamics

C. Bernard, T. DeGrand, C. DeTar, P. Lacock, S. Gottlieb, U. M. Heller, J. Hetrick, K. Orginos, D. Toussaint, R. L. Sugar

Research output: Contribution to journalArticle

38 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
Pages (from-to)745091-7450914
Number of pages6705824
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number7
StatePublished - Oct 1 2001


ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

Cite this

Bernard, C., DeGrand, T., DeTar, C., Lacock, P., Gottlieb, S., Heller, U. M., Hetrick, J., Orginos, K., Toussaint, D., & Sugar, R. L. (2001). Zero temperature string breaking in lattice quantum chromodynamics. Physical Review D - Particles, Fields, Gravitation and Cosmology, 64(7), 745091-7450914. [074509].