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arXiv 0911.0620hep-ph
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LHC上s通道单顶夸克产生和衰变的次领先级QCD修正

Next-to-leading order QCD corrections to s-channel single top quark production and decay at the LHC

Sarah Heim, Qing-Hong Cao, Reinhard Schwienhorst, C. -P. Yuan

摘要:

本文研究了LHC s通道模式下顶夸克和反顶夸克的电弱产生,包括对单(反)顶夸克产生和衰变的次领先阶(NLO)量子色动力学(QCD)修正。在窄宽度近似下,(反)顶夸克的自旋在产生和衰变过程中保持不变。通过对s-通道单顶夸克事例进行相应的运动学切割,我们给出了不同O(alpha_s)贡献对包含截面和各种运动学分布的影响.我们还讨论了测量顶夸克极化的几种可能性。

英文摘要:

We present a study of electroweak production of top and antitop quarks in the s-channel mode at the LHC, including next-to-leading order (NLO) quantum chromodynamics (QCD) corrections to the production and decay of the single (anti)top quark. The spin is preserved in production and decay by using the narrow width approximation for the (anti)top quark. We show the effect of different O(alpha_s) contributions on the inclusive cross section and various kinematic distributions at parton level after imposing relevant kinematic cuts to select s-channel single top quark events. We also discuss several possibilities for measuring the top quark polarization.

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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