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arXiv 1509.02528hep-ph
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N $^3$ LO方法计算部分子阈附近顶夸克微分截面

N$^3$LO calculations for top-quark differential cross sections near partonic threshold

Nikolaos Kidonakis

摘要:

本文用NNLL软胶子重算方法计算了强子碰撞中顶-反顶对产生和单顶产生的全截面和微分截面。我表明,软胶子修正的部分子阈值是占主导地位的贡献,顶夸克的生产和密切接近的精确结果。我提出了一个N $^3$ LO结果的总$t{\bar t}$截面,顶夸克$p_T$和快度分布,和顶夸克的前向后不对称性。我还在$t$、$s$和$tW$通道中提供了单顶生产的更新。最后,我讨论了通过反常胶子耦合的顶夸克产生。

英文摘要:

I present calculations of approximate corrections from NNLL soft-gluon resummation for total and differential cross sections in top-antitop pair production and single-top production in hadronic collisions. I show that soft-gluon corrections from partonic threshold are the dominant contribution to top-quark production and closely approximate exact results. I present aN$^3$LO results for the total $t{\bar t}$ cross section, the top-quark $p_T$ and rapidity distributions, and the top-quark forward-backward asymmetry. I also provide updates for single-top production in the $t$, $s$, and $tW$ channels. Finally, I discuss top-quark production via anomalous gluon couplings.

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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