Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2001-03-14
Phys.Rev.D64:074509,2001
Physics
High Energy Physics
High Energy Physics - Lattice
20 pages, 7 figures. With small clarifications and two additions to references. Submitted to Phys. Rev. D
Scientific paper
10.1103/PhysRevD.64.074509
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.
Bernard Claude
DeGrand Thomas
DeTar Carleton
Gottlieb Steven
Heller Urs M.
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