Melnikov Kirill, Petriello Frank
Department of Physics and Astronomy, University of Hawaii, 2505 Correa Road, Honolulu, Hawaii 96822, USA.
Phys Rev Lett. 2006 Jun 16;96(23):231803. doi: 10.1103/PhysRevLett.96.231803.
We compute the Omicron(alpha(2)(s)) QCD corrections to the fully differential cross section pp --> WX --> lnuX, retaining all effects from spin correlations. The knowledge of these corrections makes it possible to calculate with high precision the boson production rate and acceptance at the CERN Large Hadron Collider (LHC), subject to realistic cuts on the lepton and missing energy distributions. For certain choices of cuts we find large corrections when going from next-to-leading order (NLO) to next-to-next-to-leading order in perturbation theory. These corrections are significantly larger than those obtained by parton-shower event generators merged with NLO calculations. Our result may be used to assess and significantly reduce the QCD uncertainties in the many studies of boson production planned at the LHC.
我们计算了Omicron(alpha(2)(s))对全微分截面pp --> WX --> lnuX的量子色动力学（QCD）修正，保留了自旋关联的所有效应。了解这些修正使得在对轻子和缺失能量分布进行实际切割的情况下，能够高精度地计算欧洲核子研究组织大型强子对撞机（LHC）上的玻色子产生率和接受度。对于某些切割选择，我们发现在微扰理论中从次领头阶（NLO）到次次领头阶时会有很大的修正。这些修正明显大于通过与NLO计算合并的部分子淋浴事件发生器所得到的修正。我们的结果可用于评估并显著降低LHC计划进行的许多玻色子产生研究中的QCD不确定性。
