String breaking with dynamical Wilson fermions
In: Nucl.Phys.Proc.Suppl.140:609-611,2005; (2004)
Online
report
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 TxL 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.
Comment: 3 pages, 3 figures, contribution to Lattice 2004
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String breaking with dynamical Wilson fermions
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Autor/in / Beteiligte Person: | Bali, G. S. ; Duessel, Th. ; Lippert, Th. ; Neff, H. ; Prkacin, Z. ; Schilling, K. |
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Quelle: | Nucl.Phys.Proc.Suppl.140:609-611,2005; (2004) |
Veröffentlichung: | 2004 |
Medientyp: | report |
DOI: | 10.1016/j.nuclphysbps.2004.11.305 |
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