论文标题
相关的顶级夸克对生产带有重玻色子：NLO+NNLL精度处的差分横截面
Associated top quark pair production with a heavy boson: differential cross sections at NLO+NNLL accuracy
论文作者
论文摘要
我们在LHC上介绍了该过程$ pp \ to t \ bar {t} b $的选定差分横截面的理论预测，其中$ b $可以是higgs（$ h $），a $ z $或$ w $ boson。这些预测是在直接QCD框架中计算出的，直到近代领先的对数（NNLL）精度，并与完整的NLO结果匹配，包括QCD和Electroweak效果。此外，还提供了总横截面的结果。计算对理论预测进行了重大改进，尤其是对于$ t \ bar {t} h $和$ t \ bar {t} z $生产。在这些情况下，相对于中央尺度的选择，对总截面和差异截面的预测都非常稳定，并且与完整的NLO预测相比，尺度不确定性大大降低。
We present theoretical predictions for selected differential cross sections for the process $pp \to t \bar{t} B$ at the LHC, where $B$ can be a Higgs ($H$), a $Z$ or a $W$ boson. The predictions are calculated in the direct QCD framework up to the next-to-next-leading logarithmic (NNLL) accuracy and matched to the complete NLO results including QCD and electroweak effects. Additionally, results for the total cross sections are provided. The calculations deliver a significant improvement of the theoretical predictions, especially for the $t \bar{t} H$ and the $t \bar{t} Z$ production. In these cases, predictions for both the total and differential cross sections are remarkably stable with respect to the central scale choice and carry a substantially reduced scale uncertainty in comparison with the complete NLO predictions.
