翻訳と辞書 Words near each other ・ Neuviller-sur-Moselle ・ Neuvillers-sur-Fave ・ Neuvillette ・ Neuvillette, Aisne ・ Neuvillette, Somme ・ Neuvillette-en-Charnie ・ Neuvilley ・ Neuvilly ・ Neuvilly-en-Argonne ・ Neuvireuil ・ Neuvizy ・ Neutron depth profiling ・ Neutron detection ・ Neutron diffraction ・ Neutron economy ・ Neutron electric dipole moment ・ Neutron emission ・ Neutron flux ・ Neutron generator ・ Neutron howitzer ・ Neutron imaging ・ Neutron interferometer ・ Neutron magnetic moment ・ Neutron Man ・ Neutron microscope ・ Neutron moderator ・ Neutron moisture gauge ・ Neutron monitor ・ Neutron number ・ Neutron poison Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Neutron electric dipole moment ： ウィキペディア英語版 Neutron electric dipole moment The neutron electric dipole moment (nEDM) is a measure for the distribution of positive and negative charge inside the neutron. A finite electric dipole moment can only exist if the centers of the negative and positive charge distribution inside the particle do not coincide. So far, no neutron EDM has been found. The current best upper limit amounts to . == Theory == A permanent electric dipole moment of a fundamental particle violates both parity (P) and time reversal symmetry (T). This can be understood by examining the neutron with its magnetic dipole moment and hypothetical electric dipole moment. Under time reversal, the magnetic dipole moment changes its direction, whereas the electric dipole moment stays unchanged. Under parity, the electric dipole moment changes its direction but not the magnetic dipole moment. As the resulting system under P and T is not symmetric with respect to the initial system, these symmetries are violated in the case of the existence of an EDM. Having also CPT symmetry, the combined symmetry CP is violated as well. 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「Neutron electric dipole moment」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.