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arXiv 2208.09232hep-ph
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双极化$WZ$在NLO QCD + EW的强子产生:计算方法和进一步结果

Doubly-polarized $WZ$ hadronic production at NLO QCD+EW: Calculation method and further results

Duc Ninh Le, Julien Baglio, Thi Nhung Dao

摘要:

本文介绍了大型强子对撞机(LHC)上$W^\pm Z$对的双极化产生,并给出了电弱(EW)和QCD修正下的次领先阶(NLO)精度,包括用双极近似的计算方法的详细描述。在13 TeV的LHC的数值结果,特别是在$e^-\barν_e μ^+μ^-$通道使用ATLAS基准切割和偏振分布定义的$WZ$质心系统的$W^- Z$的情况下。在大多数运动学分布中,NLO EW修正相对于NLO QCD的修正小于$5\%$,但在某些分布中,如轻子横动量分布或电子与$Z$玻色子的快度分离,可以达到$10\%$的水平. EW校正对于不同极化是不均匀的。新的ATLAS测量的极化分数,我们的理论预测之间的比较。

英文摘要:

The doubly-polarized production of $W^\pm Z$ pairs at the Large Hadron Collider (LHC) is presented at next-to-leading order (NLO) accuracy both for the electroweak (EW) and QCD corrections, including a detailed description of the calculational method using the double-pole approximation. Numerical results at the 13 TeV LHC are presented in particular for the $W^- Z$ case in the $e^-\barν_e μ^+μ^-$ channel using ATLAS fiducial cuts and for polarized distributions defined in the $WZ$ center-of-mass system. The NLO EW corrections relative to the NLO QCD predictions are found to be smaller than $5\%$ in most kinematic distributions, but can reach the level of $10\%$ in some distributions such as lepton transverse momentum distributions or rapidity separation between the electron and the $Z$ boson. EW corrections are not uniform for different polarizations. A comparison between the new ATLAS measurement of polarization fractions to our theoretical prediction is presented.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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