NNLO corrections to top-pair production at hadron colliders: the all-fermionic scattering channels
NNLO corrections to top-pair production at hadron colliders: the all-fermionic scattering channels
复制标题
DOI：
10.1007/jhep12(2012)054
复制
发表时间：
2012-07
影响因子：
5.4
通讯作者：
M. Czakon;A. Mitov
中科院分区：
文献类型：
--
作者：
M. Czakon;A. Mitov
这是我们在强子对撞机上进行的对全包含的顶对产生截面的次-次-首阶（NNLO）QCD修正的计算中的第二篇论文。本文计算了文献[1]中未考虑的一个反应，该反应在唯象上可忽略不计。我们还计算了所有剩余的费米子对发起的部分子通道，和qq，有助于从NNLO开始的顶部对生产。这些反应的总截面的顶部对生产的Tevatron和LHC的贡献很小，在permil水平。这些反应最有趣的特征是它们在高能量极限的特征对数上升。我们计算的常数项在领先的权力行为在这个限制，并实现精度是一个数量级优于最近的理论预测这个常数的精度。本文计算的四个部分子反应都包含在我们的数值程序Top++中。对剩余的两个部分子反应和的NNLO修正的计算正在进行中。
This is a second paper in our ongoing calculation of the next-to-next-to-leading order (NNLO) QCD correction to the total inclusive top-pair production cross-section at hadron colliders. In this paper we calculate the reactionwhich was not considered in our previous work on[1] due to its phenomenologically negligible size. We also calculate all remaining fermion-pair-initiated partonic channels,and qq that contribute to top-pair production starting from NNLO. The contributions of these reactions to the total cross-section for top-pair production at the Tevatron and LHC are small, at the permil level. The most interesting feature of these reactions is their characteristic logarithmic rise in the high energy limit. We compute the constant term in the leading power behavior in this limit, and achieve precision that is an order of magnitude better than the precision of a recent theoretical prediction for this constant. All four partonic reactions computed in this paper are included in our numerical program Top++. The calculation of the NNLO corrections to the two remaining partonic reactions,and, is ongoing.