The structure of cosmic strings of a U(1) gauge field for the conservation of B - L
The structure of cosmic strings of a U(1) gauge field for the conservation of B - L
We consider an extension of the Standard Model, where the difference between the baryon number $B$ and the lepton number $L$ is gauged with an Abelian gauge field, in order to explain the exact conservation of $B-L$. To avoid a gauge anomaly, we add a right-handed neutrino $\nu_{\rm R}$ to …