Soft-gluon corrections for tqZ production
Soft-gluon corrections for tqZ production
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DOI：
10.1016/j.physletb.2023.137708
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发表时间：
2022-10
影响因子：
4.4
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
我们研究了在强子对撞机上单顶夸克和aZ玻色子(tqZ产生)的联合产生的软胶子修正。我们发现，辐射修正主要由软胶子发射主导。通过在精确的NLO结果中加入二阶软胶子修正，我们得到了一个近似的NNLO(ANNLO)截面。我们计算了LHC能量下的aNNLO截面，包括尺度依赖和部分子分布的不确定性。我们还计算了顶夸克快度的微分分布。我们发现，非线性光学效应的修正是显著的，它们提高了非线性光学效应的截面，同时降低了理论上的不确定性。
We study soft-gluon corrections for the associated production of a single top quark and aZboson (tqZproduction) at hadron colliders. We find that the radiative corrections are dominated by soft-gluon emission. We derive an approximate NNLO (aNNLO) cross section by adding second-order soft-gluon corrections to the exact NLO result. We calculate the aNNLO cross section at LHC energies, including uncertainties from scale dependence and from parton distributions. We also calculate differential distributions in top-quark rapidity. We show that the aNNLO corrections are significant and they enhance the NLO cross section while decreasing theoretical uncertainties.