论文标题
$ t {\ bar t}γ$交叉部分中的高阶校正
Higher-order corrections in $t{\bar t}γ$ cross sections
论文作者
论文摘要
我们研究了质子 - 蛋白质碰撞中的顶级夸克对和光子（$ t {\ bar t}γ$产生）的高阶QCD校正。我们计算了近似的NNLO横截面，二阶软性透气校正添加到完整的NLO结果中，包括尺度依赖性和Parton分布的不确定性。我们将结果与LHC的最新测量结果进行了比较，并发现软绿色校正提供了与数据的一致性。我们还计算了顶级横向动量和速度的差分分布。
We study higher-order QCD corrections for the associated production of a top-antitop quark pair and a photon ($t{\bar t}γ$ production) in proton-proton collisions. We calculate the approximate NNLO cross section, with second-order soft-gluon corrections added to the complete NLO result, including uncertainties from scale dependence and from parton distributions. We compare our results to recent measurements from the LHC, and find that the soft-gluon corrections provide improved agreement with the data. We also calculate differential distributions in top-quark transverse momentum and rapidity.
