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

Understand

We study an extended B-L model, which has in its structure four neutral scalars.

• In this model, a representative set of parameters enable us to conclude that one of these scalars is a promising candidate for low-mass dark matter.
• We introduce an Z_2 symmetry, which ensure the stability of the dark matter.
• The dominant annihilation process will be through $s$-channel exchange of a scalar in $b\overline{b}$.