B-ball Baryogenesis and the Baryon to Dark Matter Ratio
نویسندگان
چکیده
We demonstrate that B-ball decay in the MSSM can naturally solve the puzzle of why the densities of baryons and dark matter in the Universe are similar. This requires that the B-balls survive thermalization and decay below the freezeout temperature of the neutralino LSP, typically 1-10 GeV. It is shown that this can happen if the baryon asymmetry originates from a squark condensate along the d=6 ucdcdc D-flat direction of the MSSM scalar potential. For this to work the reheating temperature after inflation must be no greater than 103−5 GeV. [email protected]; [email protected]
منابع مشابه
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The gauge-mediated SUSY-breaking (GMSB) model needs entropy production at a relatively low temperature in the thermal history of the Universe for the unwanted relics to be diluted. This requires a mechanism for the baryogenesis after the entropy production, and the Affleck and Dine (AD) mechanism is a promising candidate for it. The AD baryogenesis in the GMSB model predicts the existence of th...
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