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We study an extended B-L model, which has in its structure four neutralscalars. In this model, a representative set of parameters enable us toconclude that one of these scalars is a promising candidate for low-mass darkmatter. We introduce an Z_2 symmetry, which ensure the stability of the darkmatter. The dominant annihilation process will be through $s$-channel exchangeof a scalar in $b\overline{b}$. So, this is also a Higgs portal dark mattermodel, but the Higgs decay to dark matter is suppressed and meets theconstraints from invisible decays of Higgs boson. The model is also inagreement with the constraints established by XENON100, CoGeNT and CDMSexperiments, maching the relic abundance and the cross section with nucleon.

Low Mass Pseudoscalar Dark Matter in an Extended B - L Model