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000048252 084__ $$2WoS$$aComputer Science, Interdisciplinary Applications
000048252 084__ $$2WoS$$aPhysics, Mathematical
000048252 1001_ $$0P:(DE-Juel1)132045$$aAttig, N.$$b0$$uFZJ
000048252 245__ $$aDemonstration of string breaking in quantum chromodynamics by large-scale eigenvalue computations
000048252 260__ $$aAmsterdam$$bNorth Holland Publ. Co.$$c2005
000048252 300__ $$a382 - 385
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000048252 440_0 $$01439$$aComputer Physics Communications$$v169$$x0010-4655
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000048252 520__ $$aWe present results of our ongoing determination of "string breaking" in quantum chromodynamics (QCD) including two dynamical light quarks. Our investigation of the fission of the string between a heavy (static) quark and a corresponding antiquark into a meson-antimeson system is based on dynamical configurations of size 24(3) x 40. The all-to-all light quark propagators occurring in the transition element are computed from a set of 200 low-lying eigenmodes of the Hermitian Wilson-Dirac matrix which encodes the effect of the dynamical quarks. These eigenmodes are calculated on the 1312-node IBM p690 system at the John von Neumann Institute in Julich. Combining the eigenvalue computations with a variety of ground state enhancing optimization methods we determine the matrix elements of the two-by-two system with so far unprecedented accuracy. We observe-for the first time ever in a simulation of 4-dimensional lattice-QCD-level-splitting as the perfect signature for dynamical string breaking between ground state and excited potential. (c) 2005 Elsevier B.V. All rights reserved.
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000048252 65320 $$2Author$$alattice quantum chromodynamics
000048252 65320 $$2Author$$aeigenvalue computation
000048252 65320 $$2Author$$aPARPACK
000048252 7001_ $$0P:(DE-HGF)0$$aBali, G. S.$$b1
000048252 7001_ $$0P:(DE-Juel1)VDB48500$$aDüssel, T.$$b2$$uFZJ
000048252 7001_ $$0P:(DE-Juel1)132179$$aLippert, T.$$b3$$uFZJ
000048252 7001_ $$0P:(DE-HGF)0$$aNeff, H.$$b4
000048252 7001_ $$0P:(DE-Juel1)VDB48501$$aPrkacin, Z.$$b5$$uFZJ
000048252 7001_ $$0P:(DE-HGF)0$$aSchilling, K.$$b6
000048252 773__ $$0PERI:(DE-600)1466511-6$$a10.1016/j.cpc.2005.03.085$$gVol. 169, p. 382 - 385$$p382 - 385$$q169<382 - 385$$tComputer physics communications$$v169$$x0010-4655$$y2005
000048252 8567_ $$uhttp://dx.doi.org/10.1016/j.cpc.2005.03.085
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000048252 915__ $$0StatID:(DE-HGF)0010$$aJCR/ISI refereed
000048252 9201_ $$0I:(DE-Juel1)VDB62$$d31.12.2007$$gZAM$$kZAM$$lZentralinstitut für Angewandte Mathematik$$x0
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