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Gravitational correction to running of gauge couplings. (English) Zbl 1228.83109
Summary: We calculate the contribution of graviton exchange to the running of gauge couplings at lowest nontrivial order in perturbation theory. Including this contribution in a theory that features coupling constant unification does not upset this unification, but rather shifts the unification scale. When extrapolated formally, the gravitational correction renders all gauge couplings asymptotically free.

MSC:
83E30 String and superstring theories in gravitational theory
81T13 Yang-Mills and other gauge theories in quantum field theory
81T17 Renormalization group methods applied to problems in quantum field theory
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