论文标题
有限的角系数的电动校正 - $ p_t $ $ z $ -BOSON生产和Dilepton Decay
Electroweak corrections to the angular coefficients in finite-$p_T$ $Z$-boson production and dilepton decay
论文作者
论文摘要
我们将近代领先的订单（NLO）电子校正介绍给主导的五个角系数，以有限的$ z $ -Boson质量峰值在有限的$ z $ -BOSON质量峰范围内参数为drell-yan过程。结果在矢量玻色子横向动量中差异化。 lam-tugg违反差异$ a_0-a_2 $与系数一起检查。在校正校正的情况下，需要进行单个Lepton横向动量切割，以避免光子诱导的图中的双重奇异性，并检查了对此切割值的依赖性。我们将电动校正与角系数与NLO QCD校正（包括单一Lepton切割）进行了比较。发现单一轻子切割的大小会影响两个系数$ a_0 $和$ a_2 $。对于所有单个Lepton切割值，电动校正与系数的相对尺寸均中等，并且通过外推到包含结果，对于完整的DILEPTON相空间案例也适中。但是，对于Lam-tugg违规行为，Electroweak校正对Lepton对的低$ P_T $有很大的贡献。
We present next-to-leading order (NLO) electroweak corrections to the dominant five angular coefficients parametrizing the Drell-Yan process in the $Z$-boson mass peak range for finite-$p_T$ vector boson production. The results are presented differentially in the vector boson transverse momentum. The Lam-Tung violating difference $A_0-A_2$ is examined alongside the coefficients. A single lepton transverse momentum cut is needed in the case of electroweak corrections to avoid a double singularity in the photon induced diagrams, and the dependence on the value of this cut is examined. We compare the electroweak corrections to the angular coefficients to the NLO QCD corrections, including the single lepton cut. The size of the single lepton cut is found to affect the two coefficients $A_0$ and $A_2$ to largest extent. The relative size of the electroweak corrections to the coefficients is moderate for all single lepton cut values, and by extrapolation to the inclusive results, is moderate also for the full dilepton phase space case. However, for the Lam-Tung violation, there is a significant contribution from the electroweak corrections for low $p_T$ of the lepton pair.
