Abstract
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.
- Received 30 March 2006
DOI:https://doi.org/10.1103/PhysRevLett.96.231601
©2006 American Physical Society