Neutrino masses in SU(2) ⊗ U(1) theories
Abstract
We analyze SU(2)×U(1) theories, denoted by (n, m), in which there are n neutrinos belonging to isodoublets and m neutrino isosinglets. The chargedcurrent weak interactions are described by a rectangular matrix K which we explicitly parametrize. The neutralcurrent neutrino interactions are described by a square matrix P=K^{+}K. This has the consequences that neutrinos may decay into three lighter ones and that neutrino oscillations involving neutralcurrent interactions should exist. The general formalism for the latter situation is given. Associated material on parametrization of unitary matrices and the quantum theory of Majorana particles is also briefly discussed.
 Publication:

Physical Review D
 Pub Date:
 November 1980
 DOI:
 10.1103/PhysRevD.22.2227
 Bibcode:
 1980PhRvD..22.2227S