Off-shell effects for t -channel and s -channel single-top production at next-to-leading order in QCD
Off-shell effects for t -channel and s -channel single-top production at next-to-leading order in QCD
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DOI：
10.1103/physrevd.83.094013
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发表时间：
2011-02
影响因子：
5
通讯作者：
P. Falgari;F. Giannuzzi;P. Mellor;A. Signer
中科院分区：
文献类型：
--
作者：
P. Falgari;F. Giannuzzi;P. Mellor;A. Signer
在这项工作中，我们提出了 Tevatron 和 LHC 在 7 TeV 质心能量下的 QCD 次领先级 t 通道和 s 通道单顶产量的计算。所呈现的所有横截面和运动学分布都包括由产生和衰变子过程的干扰引起的主要不可分解校正，将先前的结果扩展到窄宽度近似之外。发现新的离壳效应通常很小，但在接近运动学端点和特定分布时可能相当大
In this work we present a calculation of both t-channel and s-channel single-top production at next-to-leading order in QCD for the Tevatron and for the LHC at a center-of-mass energy of 7 TeV. All the cross sections and kinematical distributions presented include leading nonfactorizable corrections arising from interferences of the production and decay subprocesses, extending previous results beyond the narrow-width approximation. The new off shell effects are found to be generally small, but can be sizeable close to kinematical endpoints and for specific distributions