Affleck-Dine Baryogenesis after Thermal Inflation

Abstract

We argue that an extension of the Minimal Supersymmetric Standard Model that gives rise to viable thermal inflation, and so does not suffer from a Polonyi/moduli problem, should contain right-handed neutrinos which acquire their masses due to the vacuum expectation value of the flaton that drives thermal inflation. This strongly disfavours SO(10) Grand Unified Theories. The $\mu$-term of the MSSM should also arise due to the vev of the flaton. With the extra assumption that $m_L^2-m_{H_u}^2<0$, but of course $m_L^2-m_{H_u}^2+|\mu {|}^2>0$, we show that a complicated Affleck-Dine type of baryogenesis employing an $L{H}_u$ $D$-flat direction can naturally generate the baryon asymmetry of the Universe.

17 pages, LaTeX, 4 postscript figures, version to be published in Phys. Rev. D, new figures, references added, minor changes in the text

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