f{sub B} with lattice NRQCD including O(1/m{sub Q}{sup 2}) corrections

Journal Article · Mon Dec 01 04:00:00 EST 1997 · Physical Review, D

DOI:https://doi.org/10.1103/PhysRevD.56.7028· OSTI ID:564946

Ishikawa, K; Matsufuru, H; Onogi, T; Yamada, N ^[1]; Hashimoto, S ^[2]

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1. Department of Physics, Hiroshima University, Higashi-Hiroshima 739 (Japan)
2. High Energy Accelerator Research Organization (KEK), Tsukuba 305 (Japan)

We investigate higher order effects in the nonrelativistic expansion of lattice QCD (NRQCD) on the heavy-light meson decay constants and some other quantities in order to understand the truncation error of NRQCD. While our numerical results have large O(a) and O({alpha}) errors due to the use of the Wilson light quark action and tree-level matching, we find that the truncation error of higher order relativistic corrections are adequately small around the mass of the b quark. Simulations are carried out on a 16{sup 3}{times}32 lattice with 120 quenched gauge configurations generated with the plaquette action at {beta}=5.8. Systematic errors and the limitation of NRQCD theory are discussed. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 564946
• Journal Information: Physical Review, D, Journal Name: Physical Review, D Journal Issue: 11 Vol. 56; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
B MESONS
B QUARKS
CORRECTIONS
KOBAYASHI-MASKAWA MATRIX
LATTICE FIELD THEORY
QUANTUM CHROMODYNAMICS
QUARKS
SIMULATION