Type III Seesaw and Two-Component Dark Matter in $$U(1)_{B-L}$$ Model

We have studied gauged \(\mathrm{U(1)_{B-L}}\) extension of the Standard Model where neutrino masses are generated from type III seesaw mechanism. Instead of three right handed neutrinos having unit lepton number each, which is so called the minimal \(B-L\) model, the model with three fermion triplets will introduce new anomaly in the theory. Two neutral Dirac fermions having fractional \(B-L\) charges, both of which are naturally stable by virtue of a remnant \(\mathbb {Z}_2 \times \mathbb {Z}'_2\) symmetry, will also be necessary to cancel the leftover triangle anomalies. We have shown that the model can be constrained from various relevant phenomenological bounds. Another interesting property of this model is that due to the presence of additional neutral gauge bosons there can be an enhanced production of the fermion triplet in collider experiments.