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arXiv 1407.1865physics.data-anhep-exhep-ph
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形状分析的新似然性

New likelihoods for shape analysis

Sylvain Fichet

摘要:

我们引入了一种新的似然函数的基础上的序列的时刻的数据分布。两个装箱和未装箱的数据样本进行了讨论,多元的情况下,也来自。基于这种方法,我们奠定了信号搜索的形状分析的形式主义。除了基于矩的似然性之外,还提供了标准似然性和近似统计检验。从形状分析的角度来看,本文包含了足够的材料,使论文自成一体。我们认为,基于矩的似然可以有利地取代unbinned标准似然搜索的非本地信号,通过避免拟合蒙特卡洛生成的分布的步骤。这种好处随着同时分析的变量的数量而增加。基于矩的信号搜索的例子和测试在各种1D玩具模型模仿典型的高能量信号-背景配置。基于动量的技术应该特别适合于在LHC上寻找有效的操作员。

英文摘要:

We introduce a new kind of likelihood function based on the sequence of moments of the data distribution. Both binned and unbinned data samples are discussed, and the multivariate case is also derived. Building on this approach we lay out the formalism of shape analysis for signal searches. In addition to moment-based likelihoods, standard likelihoods and approximate statistical tests are provided. Enough material is included to make the paper self-contained from the perspective of shape analysis. We argue that the moment-based likelihoods can advantageously replace unbinned standard likelihoods for the search of non-local signals, by avoiding the step of fitting Monte-Carlo generated distributions. This benefit increases with the number of variables simultaneously analyzed. The moment-based signal search is exemplified and tested in various 1D toy models mimicking typical high-energy signal--background configurations. Moment-based techniques should be particularly appropriate for the searches for effective operators at the LHC.

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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