Next-to-Next-to-Leading-Order QCD Corrections to the Transverse Momentum Distribution of Weak Gauge Bosons.
Next-to-Next-to-Leading-Order QCD Corrections to the Transverse Momentum Distribution of Weak Gauge Bosons.
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DOI：
10.1103/physrevlett.120.122001
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发表时间：
2017-12
影响因子：
8.6
通讯作者：
A. Ridder;T. Gehrmann;E. Glover;A. Huss;D. Walker
中科院分区：
文献类型：
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作者：
A. Ridder;T. Gehrmann;E. Glover;A. Huss;D. Walker
弱规范玻色子的横向动量谱及其比率探测了潜在的动力学，对于测试我们对标准模型的理解至关重要。它们是精密测量（例如 W 玻色子质量提取）的重要组成部分。为了充分利用 LHC 数据的潜力，我们计算了对包含 p_{T}^{W} 谱以及 W^{-}/W^{+} 和 Z/W 谱比的二阶 [next-to-next-to-leading-order (NNLO)] QCD 校正。我们发现，NNLO QCD 校正的加入大大改善了实验 CMS 数据的理论描述，并导致残余尺度不确定性大幅降低。
The transverse momentum spectra of weak gauge bosons and their ratios probe the underlying dynamics and are crucial in testing our understanding of the standard model. They are an essential ingredient in precision measurements, such as the W boson mass extraction. To fully exploit the potential of the LHC data, we compute the second-order [next-to-next-to-leading-order (NNLO)] QCD corrections to the inclusive-p_{T}^{W} spectrum as well as to the ratios of spectra for W^{-}/W^{+} and Z/W. We find that the inclusion of NNLO QCD corrections considerably improves the theoretical description of the experimental CMS data and results in a substantial reduction of the residual scale uncertainties.