  We propose a new mechanism to understand the relation between the baryon and
dark matter asymmetries in the universe in theories where the baryon number is
a local symmetry. In these scenarios the B-L asymmetry generated through a
mechanism such as leptogenesis is transferred to the dark matter and baryonic
sectors through sphalerons processes which conserve total baryon number. We
show that it is possible to have a consistent relation between the dark matter
relic density and the baryon asymmetry in the universe even if the baryon
number is broken at the low scale through the Higgs mechanism. We also discuss
the case where one uses the Stueckelberg mechanism to understand the
conservation of baryon number in nature.
