Testing improved staggered fermions with M(S) and B(K)
Journal Article
·
· Physical Review D
OSTI ID:836483
We study the improvement of staggered fermions using hypercubically smeared (HYP) links. We calculate the strange quark mass and the kaon B-parameter, B{sub K}, in quenched QCD on a 16{sup 3} x 64 lattice at {beta} = 6.0 (1/a = 1.95 GeV). We find m{sub s}({ovr MS},2 GeV) = 101.2 {+-} 1.3 {+-} 4 MeV and B{sub K}({ovr MS},2 GeV) = 0.580 {+-} 0.018 {+-} 0.041, where the first error is from statistics and fitting, and the second from using one-loop matching factors. Comparing to quenched results obtained using unimproved staggered fermions and other discretizations, we argue that the size of discretization errors are substantially reduced by improvement.
- Research Organization:
- Thomas Jefferson National Accelerator Facility, Newport News, VA (US)
- Sponsoring Organization:
- USDOE Office of Energy Research (ER) (US)
- DOE Contract Number:
- AC05-84ER40150
- OSTI ID:
- 836483
- Report Number(s):
- JLAB-THY-04-56; DOE/ER/40150-3093; hep-lat/0409047
- Journal Information:
- Physical Review D, Journal Name: Physical Review D Vol. 71
- Country of Publication:
- United States
- Language:
- English
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