Flavor Changing Fermion-Graviton Vertices

Understand

We study the flavor-changing quark-graviton vertex that is induced at the one-loop level when gravitational interactions are coupled to the standard model.

• Because of the conservation of the energy-momentum tensor the corresponding form factors turn out to be finite and gauge-invariant.
• Analytical expressions of the form factors are provided at leading order in the external masses.
• We show that flavor-changing interactions in gravity are local if the graviton is strictly massless while if the graviton has a small mass long-range interactions inducing a flavor-changing contribution in the Newton potential appear.