Journal Article

PreJuSER-45378

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png String breaking with dynamical Wilson fermions

Bali, G. S. ; Düssel, T.FZJ* ; Lippert, T.FZJ* ; Neff, H. ; Prkacin, Z. ; Schilling, K.

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

Note: Record converted from VDB: 12.11.2012

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Contributing Institute(s):

1. Zentralinstitut für Angewandte Mathematik (ZAM)

Research Program(s):

1. Betrieb und Weiterentwicklung des Höchstleistungsrechners (I03)

Appears in the scientific report 2005

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