Bizoń Wojciech, Gehrmann-De Ridder Aude, Gehrmann Thomas, Glover Nigel, Huss Alexander, Monni Pier Francesco, Re Emanuele, Rottoli Luca, Walker Duncan M
1Institut für Theoretische Teilchenphysik (TTP), KIT, 76128 Karlsruhe, Germany.
2Institut für Kernphysik (IKP), KIT, 76344 Eggenstein-Leopoldshafen, Germany.
Eur Phys J C Part Fields. 2019;79(10):868. doi: 10.1140/epjc/s10052-019-7324-0. Epub 2019 Oct 22.
We present accurate QCD predictions for the transverse momentum ( ) spectrum of electroweak gauge bosons at the LHC for collisions, based on a consistent combination of a NNLO calculation at large and N LL resummation in the small limit. The inclusion of higher order corrections leads to substantial changes in the shape of the differential distributions, and the residual perturbative uncertainties are reduced to the few percent level across the whole transverse momentum spectrum. We examine the ratio of distributions in charged- and neutral-current Drell-Yan production, and study different prescriptions for the estimate of perturbative uncertainties that rely on different degrees of correlation between these processes. We observe an excellent stability of the ratios with respect to the perturbative order, indicating a strong correlation between the corresponding QCD corrections.
我们基于在大横向动量时的NNLO计算与在小横向动量极限下的N³LL重整化的一致组合，给出了大型强子对撞机（LHC）上e⁺e⁻碰撞中电弱规范玻色子横向动量（ ）谱的精确量子色动力学（QCD）预测。包含高阶修正会导致微分分布形状发生显著变化，并且在整个横向动量谱上，残余的微扰不确定性降低到百分之几的水平。我们研究了带电和中性流Drell-Yan产生中 分布的比率，并研究了依赖于这些过程之间不同程度相关性的微扰不确定性估计的不同方法。我们观察到这些比率相对于微扰阶数具有出色的稳定性，这表明相应的QCD修正之间存在很强的相关性。
