Phys. Rev. Lett. 96, 231601 (2006) [4 pages]

Gravitational Correction to Running of Gauge Couplings

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Sean P. Robinson^* and Frank Wilczek^†
Center for Theoretical Physics, Laboratory for Nuclear Science and Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA

Received 30 March 2006; published 15 June 2006

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.

URL:

http://link.aps.org/doi/10.1103/PhysRevLett.96.231601

DOI:

10.1103/PhysRevLett.96.231601

PACS:

12.10.Kt, 04.60.−m, 11.10.Hi

^*Electronic address: spatrick@mit.edu

^†Electronic address: wilczek@mit.edu

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Phys. Rev. Lett. 96, 231601 (2006) [4 pages]

Gravitational Correction to Running of Gauge Couplings