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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Bunching parameter ： ウィキペディア英語版 Bunching parameter In statistics as applied in particular in particle physics, when fluctuations of some observables are measured, it is convenient to transform the multiplicity distribution to the bunching parameters: :$$ \eta_q = \frac\frac^2}, where $P\_n$ is probability of observing $n$ objects inside of some phase space regions. The bunching parameters measure deviations of the multiplicity distribution $P\_n$ from a Poisson distribution, since for this distribution :$\backslash eta\_q=1$. Uncorrelated particle production leads to the Poisson statistics, thus deviations of the bunching parameters from the Poisson values mean correlations between particles and dynamical fluctuations. Normalised factorial moments have also similar properties. They are defined as :$$ F_q =\langle n \rangle^ \sum^_ \frac P_n. ==Numeric implementation== Bunching parameters and normalized factorial moments are included to the DataMelt program for data analysis and scientific computing. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Bunching parameter」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.