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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 Acoplanarity ： ウィキペディア英語版 Acoplanarity In particle physics, the acoplanarity of a scattering experiment measures the degree to which the paths of the scattered particles deviate from being coplanar. Measurements of acoplanarity provide a test of perturbative quantum chromodynamics, because QCD predicts that the emission of gluons can lead to acoplanar scattering events.〔 〕 ==Measures of acoplanarity== For a two-jet final state, a useful measure of acoplanartiy is :$\backslash varphi\; =\; \backslash pi-(\; \backslash phi\_2\; -\; \backslash phi\_1\; )$ where $\backslash phi\_i$ are the azimuthal angles of the final state jets with respect to the beam line.〔 〕 An alternative measure of acoplanarity which is infrared safe and which works for broad jets of many particles is given by :$A\; =\; 4\; \backslash min\; \backslash right)^2\}$ where $p\_i$ are the momenta of the final state particles and $p\_^i$ are the components of these momenta perpendicular to a plane chosen such that A is minimized.〔 In the case of two coplanar final state particles, the plane which minimizes A would contain the paths of both particles and the beamline, and A would equal 0. 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「Acoplanarity」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.