Natural suppression of symmetry violation in gauge theories: Muon- and electron-lepton-number nonconservation

  title={Natural suppression of symmetry violation in gauge theories: Muon- and electron-lepton-number nonconservation},
  author={Benjamin W. Lee and Robert Shrock},
  journal={Physical Review D},
We analyze the circumstances under which the violations of an approximate symmetry in a unified gauge theory of weak interactions are naturally suppressed; in particular, we investigate approximate muon- and electron-type lepton-number conservation as an example of such a symmetry. Extending earlier work, we propose a unified treatment of this symmetry together with strangeness conservation by the weak neutral current and $\mathrm{CP}$ invariance. The rate for the decay $\ensuremath{\mu… 

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