横向动量重整化对Z和W玻色子强子产生中角系数的影响
Transverse-momentum resummation effects on angular coefficients in Z and W boson hadroproduction
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中文总结 AI 辅助
该研究利用多组实验数据，通过结合小横向动量下对数增强QCD修正重整化与大\(q_T\)下固定阶计算，全面分析Z和W玻色子产生角系数，量化横向动量重整化影响，发现其在中等\(q_T\)区域有改进，其余情况不降低一致性。
中文摘要 AI 辅助
我们利用大型强子对撞机（LHC）上ATLAS、LHCb和CMS合作组的数据以及Tevatron上的CDF数据，对强子对撞机中不同运动学范围内Z和W玻色子产生的角系数进行了全面分析。我们通过将小横向动量\(q_T\)下对数增强的QCD修正重整化至次下领先对数精度（NNLL）并与大\(q_T\)下的次领先阶（NLO）固定阶计算一致结合来提供理论预测。我们量化了横向动量重整化对角系数的影响。我们发现，对于几个角系数，纳入重整化效应会在中等\(q_T\)区域（\(q_T \sim 20 - 50\) GeV）对数据描述产生适度且系统的改进，而在其余情况下，它不会降低固定阶QCD预测与实验测量的一致性。
英文摘要
We present a comprehensive analysis of the angular coefficients of $Z$ and $W$ boson production at hadron colliders in different kinematical ranges, using data from the ATLAS, LHCb, and CMS Collaborations at the LHC, as well as CDF data at the Tevatron. We provide theoretical predictions obtained by consistently combining the resummation of logarithmically enhanced QCD corrections at small transverse momenta $q_T$ up to next-to-next-to-leading logarithmic accuracy (NNLL) with fixed-order calculations at next-to-leading order (NLO), valid at large $q_T$. We quantify the impact of transverse-momentum resummation on the angular coefficients. We find that the inclusion of resummation effects leads to a moderate and systematic improvement in the description of the data in the intermediate $q_T$ region, $q_T \sim 20-50$~GeV, for several angular coefficients, while in the remaining cases it does not degrade the agreement of fixed-order QCD predictions with experimental measurements.
