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arXiv 2012.14267hep-phhep-ex
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顶夸克对产生的次次领头阶事例产生

Next-to-next-to-leading order event generation for top-quark pair production

Javier Mazzitelli, Pier Francesco Monni, Paolo Nason, Emanuele Re, Marius Wiesemann, Giulia Zanderighi

摘要:

强子碰撞中顶夸克对的产生是现代粒子物理现象学中最重要的反应之一,也是研究自然界中最重夸克性质的一种手段。在大型强子对撞机上对这一过程的分析在很大程度上依赖于对最终状态事件的蒙特卡罗模拟,其准确性受到实验测量的突出精度的挑战。在这封信中,我们提出了第一个匹配计算的顶夸克对生产的次次领头阶在QCD与所有阶辐射修正的部分子簇射模拟实现。除了它与LHC现象学的内在相关性之外,这项工作也为模拟其他具有末态色荷的强子过程迈出了重要的一步。

英文摘要:

The production of top-quark pairs in hadronic collisions is among the most important reactions in modern particle physics phenomenology and constitutes an instrumental avenue to study the properties of the heaviest quark observed in nature. The analysis of this process at the Large Hadron Collider relies heavily on Monte Carlo simulations of the final state events, whose accuracy is challenged by the outstanding precision of experimental measurements. In this letter we present the first matched computation of top-quark pair production at next-to-next-to-leading order in QCD with all-order radiative corrections as implemented via parton-shower simulations. Besides its intrinsic relevance for LHC phenomenology, this work also establishes an important step towards the simulation of other hadronic processes with colour charges in the final state.

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