TY  - JOUR
AU  - Dürr, S.
AU  - Koutsou, G.
TI  - Brillouin improvement for Wilson fermions
JO  - Physical review / D
VL  - 83
IS  - 11
SN  - 1550-7998
CY  - [S.l.]
PB  - Soc.
M1  - PreJuSER-18056
SP  - 114512
PY  - 2011
N1  - We 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.
AB  - We 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.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000291889900008
DO  - DOI:10.1103/PhysRevD.83.114512
UR  - https://juser.fz-juelich.de/record/18056
ER  -