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In physics, C-symmetry means the symmetry of physical laws under a charge-conjugation transformation. Electromagnetism, gravity and the strong interaction all obey C-symmetry, but weak interactions violate C-symmetry. ==Charge reversal in electromagnetism== The laws of electromagnetism (both classical and quantum) are invariant under this transformation: if each charge ''q'' were to be replaced with a charge −''q'', and thus the directions of the electric and magnetic fields were reversed, the dynamics would preserve the same form. In the language of quantum field theory, charge conjugation transforms: # # # Notice that these transformations do not alter the chirality of particles. A left-handed neutrino would be taken by charge conjugation into a left-handed antineutrino, which does not interact in the Standard Model. This property is what is meant by the "maximal violation" of C-symmetry in the weak interaction. (Some postulated extensions of the Standard Model, like left-right models, restore this C-symmetry.) 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「C-symmetry」の詳細全文を読む スポンサード リンク
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