Does anybody know what interpretation the invariant corresponding to the global U(1) invariance of the Dirac Lagrangian is? I have always had it in my head that it's charge, but then I realized that uncharged free particles such as neutrinos satisfy this equation too! Any thoughts much appreciated.(adsbygoogle = window.adsbygoogle || []).push({});

**Physics Forums - The Fusion of Science and Community**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Global U(1) invariant of Dirac Lagrangian

Loading...

Similar Threads - Global invariant Dirac | Date |
---|---|

Insights Higher Prequantum Geometry III: The global action functional - cohomologically - Comments | Oct 6, 2015 |

Additional Phase factors in SU(2) | Aug 31, 2015 |

Global symmetry of an N-component Klein-Gordon theory? | Dec 5, 2009 |

Systems with global phase invariance, 3D string? | Apr 28, 2009 |

(global) Gauge invariance and field theory | Jan 9, 2009 |

**Physics Forums - The Fusion of Science and Community**