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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 Quark–lepton complementarity ： ウィキペディア英語版 Quark–lepton complementarity The quark–lepton complementarity (QLC) is a possible fundamental symmetry between quarks and leptons. First proposed in 1990 by Foot and Lew,〔 〕 it assumes that leptons as well as quarks come in three "colors". Such theory may reproduce the Standard Model at low energies, and hence quark–lepton symmetry may be realized in nature. == Possible evidence for QLC == Recent neutrino experiments confirm that the Pontecorvo–Maki–Nakagawa–Sakata matrix ''U''PMNS contains large mixing angles. For example, atmospheric measurements of particle decay yield  ≈ 45°, while solar experiments yield  ≈ 34°. These results should be compared with which is small,〔F. P. An et al. (Collaboration ), Phys. Rev. Lett. 108, 171803 (2012) [arXiv:1203.1669 [hep-ex]] http://arxiv.org/abs/arXiv:1203.1669〕 and with the quark mixing angles in the Cabibbo–Kobayashi–Maskawa matrix ''U''CKM. The disparity that nature indicates between quark and lepton mixing angles has been viewed in terms of a "quark–lepton complementarity" which can be expressed in the relations :$\backslash theta\_^+\backslash theta\_^\backslash simeq\; 45^\backslash circ\; \backslash \; ,$ :$\backslash quad\; \backslash quad\; \backslash theta\_^+\backslash theta\_^\backslash simeq\; 45^\backslash circ\; \backslash \; .$ Possible consequences of QLC have been investigated in the literature and in particular a simple correspondence between the PMNS and CKM matrices have been proposed and analyzed in terms of a correlation matrix. The correlation matrix ''V''M is simply defined as the product of the CKM and PMNS matrices: :$V\_\backslash mathrm=U\_\backslash mathrm\; \backslash cdot\; U\_\backslash mathrm\; \backslash \; ,$ Unitarity implies: :$U\_\backslash mathrm=U^\_\backslash mathrmV\_\backslash mathrm\; \backslash \; .$ 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「Quark–lepton complementarity」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.