TY  - JOUR
AU  - Ammer, Maximilian
AU  - Dürr, Stephan
TI  - Calculation of c SW at one-loop order for Brillouin fermions
JO  - Physical review / D
VL  - 109
IS  - 1
SN  - 2470-0010
CY  - Ridge, NY
PB  - American Physical Society
M1  - FZJ-2024-03145
SP  - 014512
PY  - 2024
AB  - The Brillouin action is a Wilson-like lattice fermion action with a 81-point stencil, which was found to ameliorate the Wilson action in many respects. The Sheikholeslami-Wohlert coefficient cSW of the clover improvement term has a perturbative expansion cSW=c(0)SW+g20c(1)SW+O(g40). At tree-level c(0)SW=r holds for Wilson and Brillouin fermions alike. We present the Feynman rules for the Brillouin action in lattice perturbation theory, and employ them to calculate the one-loop coefficient c(1)SW with plaquette or Lüscher-Weisz gluons. Numerically its value is found to be about half that of the Wilson action.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:001172676100010
DO  - DOI:10.1103/PhysRevD.109.014512
UR  - https://juser.fz-juelich.de/record/1025782
ER  -