  We show that both the baryon asymmetry of the Universe and the dark matter
abundance can be explained within a single framework that makes use of
maximally helical hypermagnetic fields produced during pseudoscalar inflation
and the chiral anomaly in the Standard Model. We consider a minimal asymmetric
dark matter model free from anomalies and constraints. We find that the
observed baryon and the dark matter abundances are achieved for a wide range of
inflationary parameters, and the dark matter mass ranges between 7-15 GeV. The
novelty of our mechanism stems from the fact that the same source of CP
violation occurring during inflation explains both baryonic and dark matter in
the Universe with two inflationary parameters, hence addressing all the initial
condition problems in an economical way.
