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Phys Rev Lett. 2010 Nov 19;105(21):211304. Epub 2010 Nov 19.

Unified origin for baryonic visible matter and antibaryonic dark matter.

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  • 1Department of Physics, Brookhaven National Laboratory, Upton, New York 11973, USA.


We present a novel mechanism for generating both the baryon and dark matter densities of the Universe. A new Dirac fermion X carrying a conserved baryon number charge couples to the standard model quarks as well as a GeV-scale hidden sector. CP-violating decays of X, produced nonthermally in low-temperature reheating, sequester antibaryon number in the hidden sector, thereby leaving a baryon excess in the visible sector. The antibaryonic hidden states are stable dark matter. A spectacular signature of this mechanism is the baryon-destroying inelastic scattering of dark matter that can annihilate baryons at appreciable rates relevant for nucleon decay searches.

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