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).
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页数：4
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