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arXiv 1806.01601hep-phhep-ex
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LHC顶夸克对产生的横动量修正

Transverse-momentum resummation fo top-quark pair production at the LHC

Stefano Catani, Massimiliano Grazzini, Hayk Sargsyan

摘要:

我们考虑强子碰撞中顶夸克对产生的横动量重算。在顶夸克对横动量较小的情况下,数值上增强的QCD贡献被计算到所有阶次,直到接近领先的对数精度。在中等和大值的横动量,recrmation是一贯结合在固定的微扰阶的完整结果。本文给出了LHC能区顶夸克对横动量分布的数值计算结果。我们进行了详细的研究尺度依赖的结果,以估计其微扰不确定性。我们评论与ATLAS和CMS数据的比较。

英文摘要:

We consider transverse-momentum resummation for top-quark pair production in hadron collisions. At small transverse momenta of the top-quark pair, the logarithmically-enhanced QCD contributions are resummed to all orders up to next-to-leading logarithmic accuracy. At intermediate and large values of transverse momenta, the resummation is consistently combined with the complete result at fixed perturbative order. We present numerical results for the transverse-momentum distribution of top-quark pairs at LHC energies. We perform a detailed study of the scale dependence of the results to estimate their perturbative uncertainty. We comment on the comparison with ATLAS and CMS data.

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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