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arXiv 1209.4595hep-ph
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NLO之外的NLO生产,用于high-pT可观测值

WZ production beyond NLO for high-pT observables

Francisco Campanario, Sebastian Sapeta

摘要:

我们使用LoopSim和VBFNLO软件包调查合并样本的部分子事件,是准确的在QCD的NLO同时为WZ和WZ+喷气生产过程。在相空间的某些区域,这样的程序预计占主导地位的部分,非线性光学QCD修正的WZ生产过程。对于一些常用的实验观测量,我们发现,这些修正是实质性的,在30-100%的范围内,在某些情况下,它们的列入可以减少规模的不确定性的一个因素。在基本的VBFNLO计算,我们包括轻子衰变的矢量玻色子和所有的离壳和有限宽度的影响。

英文摘要:

We use the LoopSim and VBFNLO packages to investigate a merged sample of partonic events that is accurate at NLO in QCD simultaneously for the WZ and WZ+jet production processes. In certain regions of phase space such a procedure is expected to account for the dominant part of the NNLO QCD corrections to the WZ production process. For a number of commonly used experimental observables, we find that these corrections are substantial, in the 30-100% range, and in some cases their inclusion can reduce scale uncertainties by a factor of two. As in the underlying VBFNLO calculations, we include the leptonic decays of the vector bosons and all off-shell and finite-width effects.

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