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arXiv 1201.0672hep-ph
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强子对撞机上重色八重矢量玻色子介导的顶夸克对产生的精确QCD预言

Precise QCD predictions on top quark pair production mediated by massive color octet vector boson at hadron colliders

Hua Xing Zhu, Chong Sheng Li, Ding Yu Shao, Jian Wang, C. -P. Yuan

摘要:

我们提出了一个理论框架,在强子对撞机上以模型无关的方式系统地计算了次领先阶(NLO)QCD对大质量COVB模型中各种实验观测值的影响。具体地说,我们给出了在固定尺度(顶夸克质量)和动力学尺度(顶对不变质量)下,大质量COVB对顶夸克对产生的总截面、不变质量分布和AFB的非线性光学QCD修正的数值结果.我们的结果表明,在动力学标度方案下的非线性光学QCD计算比固定方案下的计算更合理,简单地用SM非线性光学K因子重新标度LO结果来估计非线性光学效应是不恰当的。

英文摘要:

We present a theoretical framework for systematically calculating next-to-leading order (NLO) QCD effects to various experimental observables in models with massive COVB in a model independent way at hadron colliders. Specifically, we show the numerical results for the NLO QCD corrections to total cross sections, invariant mass distribution and AFB of top quark pairs production mediated by a massive COVB in both the fixed scale (top quark mass) scheme and the dynamical scale (top pair invariant mass) scheme. Our results show that the NLO QCD calculations in the dynamical scale scheme is more reasonable than the fixed scheme and the naive estimate of the NLO effects by simple rescaling of the LO results with the SM NLO K-factor is not appropriate.

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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