Improved B→πlνι form factors from the lattice

被引：83

作者：

Bowler, KC ^{[1
]}

DelDebbio, L

Flynn, JM

Lellouch, L

Lesk, V

Maynard, CM

Nieves, J

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] CERN, Div Theory, CH-1211 Geneva 23, Switzerland

[4] Univ Granada, Dept Fis Moderna, E-18071 Granada, Spain

来源：

PHYSICS LETTERS B | 2000年 / 486卷 / 1-2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/S0370-2693(00)00754-1

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the results of a lattice computation of the form factors for B-0 --> pi(-)l(+)nu(l) decays near zero-recoil. These results will allow a determination of the CKM matrix element \V-ub\ when measurements of the differential decay rate become available. We also provide models for extrapolation of the form factors and rate to the full recoil range. Our computation is performed in the quenched approximation to QCD on a 24(3) x 48 lattice at beta = 6.2, using a non-perturbatively O(a)-improved action. The masses of all light valence quarks involved are extrapolated to their physical values. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：111 / 117

页数：7

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