Kl3 semileptonic form factor from (2+1)-flavor lattice QCD

被引：52

作者：

Boyle, P. A. ^{[1
]}

Juettner, A. ^{[2
]}

Kenway, R. D. ^{[1
]}

Sachrajda, C. T. ^{[3
]}

Sasaki, S. ^{[4
,5
]}

Soni, A. ^{[6
]}

Tweedie, R. J. ^{[1
]}

Zanotti, J. M. ^{[1
]}

机构：

[1] Univ Edinburgh, Sch Phys, Edinburgh EH9 3JZ, Midlothian, Scotland

[2] Johannes Gutenberg Univ Mainz, Inst Kernphys, D-55099 Mainz, Germany

[3] Univ Southampton, Sch Phys & Astron, Southampton SO17 1BJ, Hants, England

[4] Brookhaven Natl Lab, RIKEN BNL Res Ctr, Upton, NY 11973 USA

[5] Univ Tokyo, Dept Phys, Tokyo 1130033, Japan

[6] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 100卷 / 14期

基金：

英国科学技术设施理事会;

关键词：

D O I：

10.1103/PhysRevLett.100.141601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present the first results for the K(l3) form factor from simulations with 2+1 flavors of dynamical domain wall quarks. Combining our result, namely, f(+)(0)=0.964(5) with the latest experimental results for K(l3) decays leads to vertical bar V(us)vertical bar=0.2249(14), reducing the uncertaintity in this important parameter. For the O(p(6)) term in the chiral expansion we obtain Delta f=-0.013(5).

引用

页数：4

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