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arXiv 1002.4557hep-ph
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过滤喷流算法中的非全局对数

Non-Global Logarithms in Filtered Jet Algorithms

Mathieu Rubin

摘要:

我们分析和数值研究的影响微扰胶子发射的“过滤分析”,这是一个subjet分析程序的一部分,两年前提出的可能确定一个低质量的希格斯玻色子衰变到b \bar{b}在大型强子对撞机。这使我们能够研究在单对数大Nc近似下所得到的微扰级数的非整体结构,包括所有阶的数值结果,对它们的简单解析近似以及对它们级数展开结构的评论。然后利用这些结果半解析地优化滤波分析的参数,以尽可能地抑制潜在事件和堆积效应对Higgs质量峰重建的影响,同时保留b \bar{b}偶极子的大部分微扰辐射。

英文摘要:

We analytically and numerically study the effect of perturbative gluons emission on the "Filtering analysis", which is part of a subjet analysis procedure proposed two years ago to possibly identify a low-mass Higgs boson decaying into b\bar{b} at the LHC. This leads us to examine the non-global structure of the resulting perturbative series in the leading single-log large-N_c approximation, including all-orders numerical results, simple analytical approximations to them and comments on the structure of their series expansion. We then use these results to semi-analytically optimize the parameters of the Filtering analysis so as to suppress as much as possible the effect of underlying event and pile-up on the Higgs mass peak reconstruction while keeping the major part of the perturbative radiation from the b\bar{b} dipole.

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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