Common Origin of Neutrino Mass and Dark Matter from Anomaly Cancellation
  Requirements of a $U(1)_{B-L}$ Model
  We study a gauged $B-L$ extension of the standard model where the new
fermions with fractional $B-L$ charges that play the role of keeping the model
anomaly free can also explain the origin of neutrino mass at one loop level as
well as dark matter. We discuss two different versions of the model to realise
fermion and scalar dark matter, both of which guarantee the dark matter
stability by a remnant discrete symmetry to which $U(1)_{B-L}$ gauge symmetry
gets spontaneously broken down to. Apart from giving rise to the observed
neutrino mass and dark matter abundance, the model also has tantalising
signatures at variety of experiments operating at cosmic, intensity and energy
frontiers, particularly direct and indirect detection experiments of dark
matter, rare decay experiments looking for charged lepton flavour violation as
well as collider experiments. The model also predicts vanishing lightest
neutrino mass that can be tested at experiments sensitive to the absolute
neutrino mass scale.
