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| Hauptseite > Publikationsdatenbank > String breaking with dynamical Wilson fermions |
| Journal Article | PreJuSER-45378 |
; ; ; ; ;
2005
Elsevier
Amsterdam
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Please use a persistent id in citations: doi:10.1016/j.nuclphysbps.2004.11.305
Abstract: We present results of our ongoing determination of string breaking in full QCD with N-f = 2 Wilson fermions. Our investigation of the fission of the static quark-antiquark string into a static-light meson-antimeson system is based on dynamical configurations of size 24 3 x 40 produced by the TchiL collaboration. Combining various optimization methods we determine the matrix elements of the two-by-two system with so far unprecedented accuracy. The all-to-all light quark propagators occurring in the transition element are computed from eigenmodes of the Hermitian Wilson-Dirac matrix complemented by stochastic estimates in the orthogonal subspace. We observe a clear signature for level-splitting between ground state and excited potential. Thus, for the first time, string breaking induced by sea quarks is observed in a simulation of 4-dimensional lattice-QCD.
Keyword(s): J
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