QCD corrections in $$tq\gamma $$ production at hadron colliders
QCD corrections in $$tq\gamma $$ production at hadron colliders
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DOI：
10.1140/epjc/s10052-022-10643-z
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发表时间：
2022-01
期刊：
影响因子：
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通讯作者：
N. Kidonakis;N. Yamanaka
中科院分区：
文献类型：
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作者：
N. Kidonakis;N. Yamanaka
本文研究了强子对撞机上单个顶夸克和光子的联合产生的QCD修正。我们计算的非线性光学截面在大型强子对撞机和未来的对撞机能量为各种运动学削减，我们估计的不确定性尺度依赖性和部分子分布。我们还计算了顶夸克横动量和快度以及光子能量的微分分布。最后，我们研究了软胶子辐射对这一过程的高阶修正，并给出了截面和顶夸克微分分布的近似NNLO（aNNLO）结果。我们还比较了我们的计算与最近的测量CMS和ATLAS在大型强子对撞机，发现aNNLO修正改善了数据和标准模型预测之间的比较。
We study QCD corrections for the associated production of a single top quark and a photon (production) at hadron colliders. We calculate the NLO cross section at LHC and future collider energies for a variety of kinematical cuts, and we estimate uncertainties from scale dependence and from parton distributions. We also calculate differential distributions in top-quark transverse-momentum and rapidity as well as photon energy. Finally, we study higher-order corrections from soft-gluon emission for this process, and we provide approximate NNLO (aNNLO) results for the cross section and top-quark differential distributions. We also compare our calculations with recent measurements from CMS and ATLAS at the LHC and find that the aNNLO corrections improve the comparison between the data and the Standard Model predictions.