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arXiv · 1211.4921

Hubble-induced mass from MSSM plasma

Masahiro Kawasaki·Fuminobu Takahashi·Tomohiro Takesako
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Abstract

We evaluate the effective mass of a scalar field phi coupled to thermal plasma through Planck-suppressed interactions. We find it useful to rescale the coupled fields so that all the phi-dependences are absorbed into the yukawa and gauge couplings, which allows us to read off the leading order contributions to the effective mass \tilde m_{phi} from the 2-loop free energy calculated with the rescaled couplings. We give an analytical expression for \tilde m_{phi} at a sufficiently high temperature in the case where phi is coupled to the MSSM chiral superfields through non-minimal Kahler potential. We find that \tilde m_{phi}^2 is about 10^{-3} H^2 \sim 10^{-2} H^2 for typical parameter sets, where H is the Hubble expansion rate in the radiation-dominated era.

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Masahiro Kawasaki, Fuminobu Takahashi, Tomohiro Takesako. 2013-04-04. Hubble-induced mass from MSSM plasma. https://doi.org/10.1088/1475-7516%2F2013%2F04%2F008

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