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Cosmological Constant and Quantum Gravitational Corrections to the Running Fine Structure Constant

Lookup NU author(s): Professor David Toms

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Abstract

The quantum gravitational contribution to the renormalization group behavior of the electric charge in Einstein-Maxwell theory with a cosmological constant is considered. Quantum gravity is shown to lead to a contribution to the running charge not present when the cosmological constant vanishes. This reopens the possibility, suggested by Robinson and Wilczek, of altering the scaling behavior of gauge theories at high energies although our result differs. We show the possibility of an ultraviolet fixed point that is linked directly to the cosmological constant. © 2008 The American Physical Society.

Publication metadata

Author(s): Toms DJ

Publication type: Article

Publication status: Published

Journal: Physical Review Letters

Year: 2008

Volume: 101

Issue: 13

ISSN (print): 0031-9007

ISSN (electronic): 1079-7114

Publisher: American Physical Society

URL: http://dx.doi.org/10.1103/PhysRevLett.101.131301

DOI: 10.1103/PhysRevLett.101.131301

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