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arXiv 0902.2760hep-phhep-th
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强子对撞机上W + 3喷流产生的精确预测

Precise Predictions for W + 3 Jet Production at Hadron Colliders

C. F. Berger, Z. Bern, L. J. Dixon, F. Febres Cordero, D. Forde, T. Gleisberg, H. Ita, D. A. Kosower, D. Maitre

摘要:

本文报道了强子碰撞中W + 3喷注产生的次主导阶QCD计算,包括所有的部分子过程。我们比较的结果与CDF数据从Tevatron,并找到很好的协议。重正化和因式分解的规模依赖性大大减少相比,领先的顺序计算。所需的单循环矩阵元素使用在壳方法计算,并在数值程序BlackHat中实现。我们使用SHERPA软件包来生成实际的排放贡献,并整合相空间上的各种贡献。我们对虚拟零件使用了一个主色(大N_c)近似,我们在W +1,2-jet生产中确认了它的有效性,误差在3%以内。目前的计算表明,在大型强子对撞机的物理分析重要的过程中,用于计算次到领先的阶修正壳方法的实用性。

英文摘要:

We report on the first next-to-leading order QCD computation of W + 3-jet production in hadronic collisions including all partonic subprocesses. We compare the results with CDF data from the Tevatron, and find excellent agreement. The renormalization and factorization scale dependence is reduced substantially compared to leading-order calculations. The required one-loop matrix elements are computed using on-shell methods, implemented in a numerical program, BlackHat. We use the SHERPA package to generate the real-emission contributions and to integrate the various contributions over phase space. We use a leading-color (large-N_c) approximation for the virtual part, which we confirm in W + 1,2-jet production to be valid to within three percent. The present calculation demonstrates the utility of on-shell methods for computing next-to-leading-order corrections to processes important to physics analyses at the Large Hadron Collider.

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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