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000018056 084__ $$2WoS$$aAstronomy & Astrophysics
000018056 084__ $$2WoS$$aPhysics, Particles & Fields
000018056 1001_ $$0P:(DE-Juel1)132580$$aDürr, S.$$b0$$uFZJ
000018056 245__ $$aBrillouin improvement for Wilson fermions
000018056 260__ $$a[S.l.]$$bSoc.$$c2011
000018056 264_1 $$2Crossref$$3online$$bAmerican Physical Society (APS)$$c2011-06-21
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000018056 440_0 $$04923$$aPhysical Review D$$v83$$x1550-7998$$y11
000018056 500__ $$aWe thank Zoltan Fodor for useful correspondence. Computations were performed on the high-performance cluster JUROPA at JSC, with resources allocated through a NIC grant. Both authors were supported by the SFB TR-55.
000018056 520__ $$aWe present a parameter-free Wilson-type lattice Dirac operator with an 81-point stencil for the covariant derivative and the Laplacian, which attempts to minimize the breaking of rotational symmetry near the boundary of the Brillouin zone. The usefulness of this "Brillouin operator" in practical applications is explored by studying the scaling of pseudoscalar decay constants in quenched QCD, with rather good results in the physical charm region. We also investigate the suitability of this operator as a kernel to the overlap procedure. Here, the resulting overlap operator is found to be cheaper to construct and significantly better localized than the variety with the standard Wilson kernel.
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000018056 7001_ $$0P:(DE-Juel1)VDB102942$$aKoutsou, G.$$b1$$uFZJ
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