A note on the dimensional regularization of the Standard Model coupled with Quantum Gravity

Details A note on the dimensional regularization of the Standard Model coupled with Quantum Gravity A note on the dimensional regularization of the Standard Model coupled with Quantum Gravity

2004-04-04

arxiv.org/abs/hep-th/0404032v2

Phys.Lett. B596 (2004) 90-95

Physics

High Energy Physics

High Energy Physics - Theory

8 pages; v2: comment on first order formalism, PLB

Scientific paper

10.1016/j.physletb.2004.06.089

In flat space, gamma5 and the epsilon tensor break the dimensionally continued Lorentz symmetry, but propagators have fully Lorentz invariant denominators. When the Standard Model is coupled with quantum gravity gamma5 breaks the continued local Lorentz symmetry. I show how to deform the Einstein lagrangian and gauge-fix the residual local Lorentz symmetry so that the propagators of the graviton, the ghosts and the BRST auxiliary fields have fully Lorentz invariant denominators. This makes the calculation of Feynman diagrams more efficient.

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