The energy distribution of subjets and the jet shape
The energy distribution of subjets and the jet shape
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DOI：
10.1007/jhep07(2017)064
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发表时间：
2017-05
影响因子：
5.4
通讯作者：
Z. Kang;F. Ringer;W. Waalewijn
中科院分区：
文献类型：
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作者：
Z. Kang;F. Ringer;W. Waalewijn
我们提出了一个描述半径为r的射流中半径为r的射流的能量分布的框架。我们既考虑了包括射流的样本，也考虑了以预定轴为中心的射流，从中可以得到射流的形状。对于r≪r，我们在角尺度r和r上考虑了物理因素，以恢复r/ r的对数。对于中心主题，我们考虑标准射流轴和赢家通吃轴，它们分别涉及r/ r的双对数和单对数。给出了所有相关的单回路匹配系数，解决了以往锥型射流计算结果不一致的问题。我们对标准射流形状的计算结果与之前的计算结果在对数数量级上有所不同，因为我们考虑了软辐射引起的标准射流轴的反冲。本文给出了pp→jet+ X在次领先阶和领先对数阶下的包含子射流样本的数值结果。
We present a framework that describes the energy distribution of subjets of radius r within a jet of radius R. We consider both an inclusive sample of subjets as well as subjets centered around a predetermined axis, from which the jet shape can be obtained. For r≪ R we factorize the physics at angular scales r and R to resum the logarithms of r/R. For central subjets, we consider both the standard jet axis and the winner-take-all axis, which involve double and single logarithms of r/R, respectively. All relevant one-loop matching coefficients are given, and an inconsistency in some previous results for cone jets is resolved. Our results for the standard jet shape differ from previous calculations at next-to-leading logarithmic order, because we account for the recoil of the standard jet axis due to soft radiation. Numerical results are presented for an inclusive subjet sample for pp→ jet+ X at next-to-leading order plus leading logarithmic order.