O(alpha_s^2) 精度下的顶夸克阈值产生
高能物理 - 唯象学
2009-10-31 v3
摘要
我们计算了在阈值区域e+e-湮灭中顶夸克对产生截面的次次领头阶修正，重求和了微扰级数的所有 O [ (alpha_s/beta)^n (alpha_s^2, beta^2, alpha_s beta) ] 项。我们发现NNLO修正的幅度与NLO修正的大小相当。
引用
@article{arxiv.hep-ph/9802379,
title = {Top quark production at threshold with O(alpha_s^2) accuracy},
author = {Kirill Melnikov and Alexander Yelkhovsky},
journal= {arXiv preprint arXiv:hep-ph/9802379},
year = {2009}
}
备注
15 pages, Latex, one figure, some misprints corrected