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arXiv 0804.2220hep-ph
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对LHC的t-tbar-Z生产的次领先订单QCD校正

Next-to-leading order QCD corrections to t-tbar-Z production at the LHC

Achilleas Lazopoulos, Thomas McElmurry, Kirill Melnikov, Frank Petriello

摘要:

本文计算了散射过程pp \to t t bar Z的次首阶QCD全修正。该通道将用于大型强子对撞机上的t t bar Z电弱耦合的测量。这些耦合不能在当前的实验中直接测量。为了得到这些结果,我们利用一种新的,完全数值方法进行高阶QCD计算。我们发现,对于合理的值的重整化和因式分解标度的QCD校正增加了35%的领先秩序的结果,而减少了理论误差所产生的未计算的高阶修正到约10%。

英文摘要:

We present a calculation of the full next-to-leading order QCD corrections to the scattering process pp \to t tbar Z. This channel will be used to measure the t tbar Z electroweak couplings at the Large Hadron Collider. These couplings cannot be directly measured in current experiments. To obtain these results, we utilize a novel, completely numerical approach to performing higher order QCD calculations. We find that for reasonable values of the renormalization and factorization scales the QCD corrections increase the leading order result by 35 percent, while reducing the theoretical error arising from uncalculated higher order corrections to approximately 10 percent.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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