Charge nonconservation and charges of neutrinos, neutron, and atoms

A spontaneous charge-symmetry-breaking model is proposed in the framework of $\mathrm{SU}{\mathrm{}\left(3\right)\mathrm{}}_C\times \mathrm{SU}{\mathrm{}\left(2\right)\mathrm{}}_L\times \mathrm{U}{\mathrm{}\left(1\right)\mathrm{}}_Y$ theory with two doublet and one singlet Higgs bosons. In this model, the electron neutrino has a minicharge which is essentially different from the neutron charge. The model contains a mechanism to keep the photon mass very small. The present experimental bounds on these charges are also discussed.