π介子形状因子与QCD求和规则：轴矢流情形
高能物理 - 唯象学
2009-11-10 v2
摘要
我们给出了在轴矢量π介子流情形下，微扰论次领头阶的π介子形状因子的QCD求和规则分析。π介子形状因子对Q^2依赖性的理论预言与现有实验数据吻合良好。结果表明，在这种情况下NLO修正很大，在严格的理论分析中应予以考虑。
引用
@article{arxiv.hep-ph/0403240,
title = {Pion form factor and QCD sum rules: case of axial current},
author = {V. V. Braguta and A. I. Onishchenko},
journal= {arXiv preprint arXiv:hep-ph/0403240},
year = {2009}
}
备注
LaTeX file, 10 pages, 5 figures, v2: added check of Ward identity constrains at Q^2=0, the continuum thresholds are determined to satisfy F_{\pi}(0)=1 condition with NLO accuracy, what led to \approx 10% reduction of our numerical estimates, references added