Supersymmetric cosmology and running masses and coupling constants

Physics – Nuclear Physics

Scientific paper

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Scientific paper

We discuss the possibility that the phase transition to the SU(5) asymmetric phase of a supersymmetric grand unified theory occurs without bubble formation, the temperature-dependent mass squared having changed sign. When this phase transition does occur by bubble formation, we study the effect of running coupling constants and masses on the tunnelling rate. The constraints on Higgs scalar masses resulting from the requirement that the theory be asymptotically free are also discussed.

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