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arXiv 0708.1689hep-ph
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强子对撞机上N^2 LO以外Z和W^ \pm玻色子快度分布的阈值修正

Threshold corrections to rapidity distributions of Z and W^\pm bosons beyond N^2 LO at hadron colliders

V. Ravindran, J. Smith

摘要:

利用N ${}^3$ LO水平上的Sudakov图解截面,给出了强子对撞机上$Z$和$W^\pm$玻色子快度分布的阈值增强微扰QCD修正.我们使用重整化群不变性和质量因子分解定理,这些硬散射截面满足构造QCD振幅。我们表明,这些高阶阈值QCD校正稳定的理论预测矢量玻色子生产在大型强子对撞机的重整化和因式分解尺度的变化下。

英文摘要:

Threshold enhanced perturbative QCD corrections to rapidity distributions of $Z$ and $W^\pm$ bosons at hadron colliders are presented using the Sudakov resummed cross sections at N${}^3$LO level. We have used renormalisation group invariance and the mass factorisation theorem that these hard scattering cross sections satisfy to construct the QCD amplitudes. We show that these higher order threshold QCD corrections stabilise the theoretical predictions for vector boson production at the LHC under variations of both renormalisation and factorisation scales.

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