e+e-湮灭为强子的次次领头阶QCD修正的改进评估
高能物理 - 唯象学
2009-10-28 v2
摘要
考虑了e+e-湮灭为强子的次次领头阶QCD修正。详细讨论了在五种、四种和三种活跃夸克味的情况下，预言对重整化方案变化的稳定性。该分析基于最近提出的根据展开系数方案不变组合中引入的抵消程度来选择重整化方案的条件。结果表明，传统展开所得预言的方案依赖性不确定性很大，尤其是在较低能量下。然而，通过利用围道积分表示并数值计算围道积分，以更精确的方式评估QCD修正时，预言的稳定性得到了极大改善。
引用
@article{arxiv.hep-ph/9602245,
title = {Improved Evaluation of the Next-Next-To-Leading Order QCD Corrections to the e+e- Annihilation Into Hadrons},
author = {P. A. Raczka and A. Szymacha},
journal= {arXiv preprint arXiv:hep-ph/9602245},
year = {2009}
}
备注
23 pages in LateX, 15 PostScript figures in tarred, gzipped and uuencoded file. Misprint in Eq.6 has been corrected, two references added, and a comment on related paper included