Assertion: neutrino's lepton number | /r/HasProperty | violated in one of the models
Facets:
value: spontaneously
type: MANNER
Source sentences:
text: In one of the models (the so-called economical one), the lepton number is spontaneously violated and it is found that the would be Majoron is not present because it is gauged away, providing in this way the longitudinal polarization component to a now massive gauge field.