Decay constants of B and D mesons from non-perturbatively improved lattice QCD

被引：72

作者：

Bowler, KC

Del Debbio, L

Flynn, JM

Lacagnina, GN ^{[1
]}

Lesk, VI

Maynard, CM

Richards, DG

机构：

[1] Univ Edinburgh, Dept Phys & Astron, Edinburgh EH9 3JZ, Midlothian, Scotland

[2] Univ Southampton, Dept Phys & Astron, Southampton SO17 1BJ, Hants, England

[3] Jefferson Lab, Newport News, VA 23606 USA

[4] Old Dominion Univ, Dept Phys, Norfolk, VA 23529 USA

来源：

NUCLEAR PHYSICS B | 2001年 / 619卷 / 1-3期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1016/S0550-3213(01)00511-9

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

The decay constants of B, D and K mesons are computed in quenched lattice QCD at two different values of the coupling. The action and operators are O(a) improved with non-perturbative coefficients. The results are f(B) = 195(6)(-) (+24)(23) MeV, f(D) = 206(4)(-10)(+17) MeV, f(Bs) = 220(6)(-28)(+23) MeV, f(Ds) = 229(3)(-12)(+23) MeV and f(K) = 150(3)(-8)(+12) MeV. Systematic errors are discussed in detail. Results for vector decay constants, flavour symmetry breaking ratios of decay constants, the pseudoscalar-vector mass splitting and D meson masses are also presented. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：507 / 537

页数：31

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