B-meson properties from lattice QCD
B-meson properties from lattice QCD
复制标题
晶格 QCD 的 B 介子特性
DOI:
10.1016/0370-2693(91)90219-g
复制
发表时间:
1991
影响因子:
4.4
通讯作者:
R. Sommer
中科院分区:
文献类型:
--
作者:
C. Alexandrou;F. Jegerlehner;S. Güsken;K. Schilling;R. Sommer
A high statistics computation of the decay constant ƒBis presented to study scaling and finite size effects. Smooth wave functions for the B-meson allow to suppress excited state contributions effectively. We observe the scaling violation in the static approximation to be 15% between β = 5.7 and 6.0. The conventional light quark methods appear to remain applicable, at β = 6.0 even beyond the D-meson mass. The value obtained in the static approximation, ƒB= 366 ± 22( stat. ) ± 55 ( syst. ) MeV , cannot be reached by smooth extrapolation from the D-meson range, where we find ƒD= 198 ± 17 MeV .