Testing improved staggered fermions with m{sub s} and B{sub K}

Journal Article · Sun May 01 04:00:00 EDT 2005 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.71.094501· OSTI ID:20709384

Lee, Weonjong ^[1]; Bhattacharya, Tanmoy; Gupta, Rajan ^[2]; Fleming, George T ^[3]; Kilcup, Gregory ^[4]; Sharpe, Stephen R ^[5]

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1. School of Physics, Seoul National University, Seoul, 151-747 (Korea, Republic of)
2. Los Alamos National Laboratory, MS-B285, T-8, Los Alamos, New Mexico 87545 (United States)
3. Jefferson Laboratory, 12000 Jefferson Avenue, Newport News, Virginia 23606 (United States)
4. Department of Physics, Ohio State University, Columbus, Ohio 43210 (United States)
5. Physics Department, University of Washington, Seattle, Washington 98195-1560 (United States)

We study the improvement of staggered fermions using hypercubically smeared links. We calculate the strange quark mass and the kaon B parameter, B{sub K}, in quenched QCD on a 16{sup 3}x64 lattice at {beta}=6.0. We find m{sub s}(MS,2 GeV)=101.2{+-}1.3{+-}4 MeV and B{sub K}(MS,2 GeV)=0.578{+-}0.018{+-}0.042, where the first error is from statistics and fitting, and the second from using one-loop matching factors. The scale (1/a=1.95 GeV) is set by M{sub {rho}}, and m{sub s} is determined using the kaon mass. Comparing to quenched results obtained using unimproved staggered fermions and other discretizations, we argue that the size of discretization errors in B{sub K} is substantially reduced by improvement.

• OSTI ID: 20709384
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 9 Vol. 71; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
GEV RANGE
KAONS
MEV RANGE
QUANTUM CHROMODYNAMICS
REST MASS
S QUARKS
STATISTICS