Dark matter and the baryon asymmetry of the universe.
We present a mechanism to generate the baryon asymmetry of the Universe which preserves the net baryon number created in the big bang. If dark matter particles carry baryon number Bx, and sigmaxannih<sigmaxannih, the X's freeze-out at a higher temperature and have a larger relic density than X's. If mX<or approximately 4.5BX GeV and the annihilation cross sections differ by Omicron(10%) or more, this type of scenario naturally explains the observed OmegaDM approximately 5Omegab.
Center for Cosmology and Particle Physics, Department of Physics. New York University, New York, New York 10003, USA.
Glennys R
GR
Farrar
Gabrijela
G
Zaharijas