Lattice QCD without tuning, mixing and current renormalization
Abstract
The classically perfect action of QCD requires no tuning to get the pion massless in the broken phase: the critical bare mass m_{q}^{c} is zero. Neither the vector nor the flavour nonsinglet axial vector currents need renormalization. Further, there is no mixing between 4fermion operators in different chiral representations. The order parameter of chiral symmetry requires, however, a subtraction which is given here explicitly. These results are based on the fact that the fixed point action satisfies the GinspargWilson remnant chiral symmetry condition. On chiral symmetry related questions any other local solution of this condition will produce similar results.
 Publication:

Nuclear Physics B
 Pub Date:
 August 1998
 DOI:
 10.1016/S05503213(98)00399X
 arXiv:
 arXiv:heplat/9802007
 Bibcode:
 1998NuPhB.525..401H
 Keywords:

 High Energy Physics  Lattice
 EPrint:
 10 pages, Latex