Corrections to gauge theories in effective quantum gravity with a cutoff
arXiv:1307.4651 · doi:10.1142/S0217732314500242
Abstract
We calculate the lowest order quantum gravity contributions to QED beta function in an effective field theory picture with a momentum cutoff. We use a recently proposed 4 dimensional improved momentum cutoff that preserves gauge and Lorentz symmetries. We find that there is non-vanishing quadratic contribution to the photon 2-point function but that does not lead to the running of the original coupling after renormalization. We argue that gravity cannot turn gauge theories asymptotically free.
11 pages, 1 figure
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