2+1味格点QCD中粲介子半轻衰变形状因子的研究进展
高能物理 - 格点
2010-03-19 v1
摘要
粲介子半轻衰变D→K l ν和D→π l ν的形状因子的格点计算，为直接确定CKM矩阵元|V(cs)|和|V(cd)|提供了输入，并且可以设计用于验证底介子半轻衰变B→π l ν和B→K l l-bar的形状因子的计算。我们使用Fermilab粲(底)夸克和asqtad交错轻夸克，在2+1味asqtad MILC系综上计算粲(底)形状因子。我们概述了对先前粲形状因子计算的改进，并详述了我们的进展。我们预期当前这一轮的数据生成能够将|V(cs)|和|V(cd)|的理论不确定性分别从10.5%和11%降低到约7%。
引用
@article{arxiv.0912.0214,
title = {Progress on charm semileptonic form factors from 2+1 flavor lattice QCD},
author = {Jon A. Bailey and A. Bazavov and C. Bernard and C. Bouchard and C. DeTar and A. X. El-Khadra and E. D. Freeland and W. Freeman and E. Gamiz and Steven Gottlieb and U. M. Heller and J. E. Hetrick and A. S. Kronfeld and J. Laiho and L. Levkova and P. B. Mackenzie and M. B. Oktay and M. Di Pierro and J. N. Simone and R. Sugar and D. Toussaint and R. S. Van de Water},
journal= {arXiv preprint arXiv:0912.0214},
year = {2010}
}
备注
7 pages, 2 figures, parallel talk at 27th International Symposium on Lattice Field Theory (Lattice 2009), Beijing, China, 25-31 Jul 2009; typos corrected