Observation of String Breaking in QCD

Abstract

We numerically investigate the transition of the static quark-antiquark string into a static-light meson-antimeson system. Improving noise reduction techniques, we are able to resolve the signature of string breaking dynamics for n_f=2 lattice QCD at zero temperature. This result can be related to properties of quarkonium systems. We also study short-distance interactions between two static-light mesons.

27 pages, 22 figures, changed decimal place of errors in 3 entries of Table, corrected references

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• Smeared propagators for lattice hadron spectroscopy
• The eta ' signal from partially quenched Wilson fermions
• NRQCD and Static Systems -- A General Variational Approach
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