Conformally related early universe models can be told apart by the location of frame-invariant variables built from the time variation of particle and Planck masses.
5: The region in parameter space of {D/γ, ˙D/(M 0 plγ2)} which corresponds to slow-contraction in Jordan frame while matter-contraction in Einstein frame (M-group)
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Towards degeneracy breaking of early universe models
Conformally related early universe models can be told apart by the location of frame-invariant variables built from the time variation of particle and Planck masses.