Regular Article - Theoretical Physics
The flavor of quantum gravity
Physics and Astronomy, University of Sussex, Falmer, Brighton, BN1 9QH, UK
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Revised: 19 September 2011
Published online: 4 November 2011
We develop an effective field theory to describe the coupling of non-thermal quantum black holes to particles such as those of the Standard Model. The effective Lagrangian is determined by imposing that the production cross section of a non-thermal quantum black hole be given by the usual geometrical cross section. Having determined the effective Lagrangian, we estimate the contribution of a virtual hole to the anomalous magnetic moment of the muon, μ→eγ transition and to the electric dipole moment of the neutron. We obtain surprisingly weak bounds on the Planck mass due to a chiral suppression factor in the calculated low energy observables. The tightest bounds come from μ→eγ and the limit on the neutron electric dipole moment. These bounds are in the few TeV region.
© Springer-Verlag / Società Italiana di Fisica, 2011