Grand Unification and Time Variation of the Gauge Couplings

Details Grand Unification and Time Variation of the Gauge Couplings Grand Unification and Time Variation of the Gauge Couplings

2002-11-26

arxiv.org/abs/hep-ph/0211421v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

talk given at the 10th International Conference on Supersymmetry and Unification of Fundamental Interactions (SUSY02), Hamburg

Scientific paper

Astrophysical indications that the fine structure constant is time dependent are discussed in the framework of grand unification models. A variation of the electromagnetic coupling constant could either be generated by a corresponding time variation of the unified coupling constant or by a time variation of the unification scale, or by both. The case in which the time variation of the electromagnetic coupling constant is caused by a time variation of the unification scale is of special interest. It is supported in addition by recent hints towards a time change of the proton-electron mass ratio. Possible implications for baryogenesis are discussed.

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