Improving flavor symmetry in the Kogut-Susskind hadron spectrum
Abstract
We study the effect of modifying the coupling of Kogut-Susskind quarks to the gauge field by replacing the link matrix in the quark action by a ``fat link,'' or sum of link plus three-link paths. Flavor symmetry breaking, determined by the mass difference between the Goldstone and non-Goldstone local pions, is reduced by approximately a factor of 2 by this modification.
- Publication:
-
Physical Review D
- Pub Date:
- February 1997
- DOI:
- 10.1103/PhysRevD.55.R1133
- arXiv:
- arXiv:hep-lat/9609036
- Bibcode:
- 1997PhRvD..55.1133B
- Keywords:
-
- 11.15.Ha;
- 12.38.Gc;
- Lattice gauge theory;
- Lattice QCD calculations;
- High Energy Physics - Lattice
- E-Print:
- 9 pages, 1 figure, uses epsf.sty