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
期刊:
影响因子:
4.4
通讯作者:
R. Sommer
R. Sommer
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
C. Alexandrou;F. Jegerlehner;S. Güsken;K. Schilling;R. Sommer

文献摘要

被引文献

相似文献

本文提出了一种高统计量的衰变常数的计算方法,用于研究尺度效应和有限尺寸效应。B介子的光滑波函数可以有效地抑制激发态的贡献。我们观察到静态近似中的标度违反在β = 5.7和6.0之间为15%。在β = 6.0甚至超过D介子质量时,传统的轻夸克方法似乎仍然适用。在静态近似中获得的值,Δ B = 366 ± 22(stat.)± 55(系统)MeV,不能从D介子范围通过平滑外推达到,在那里我们发现Δ D = 198 ± 17 MeV。
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 .