Flavor Changing Fermion-Graviton Vertices

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dc.creatorDegrassi, G.
dc.creatorGabrielli, E.
dc.creatorTrentadue, L.
dc.date2008-12-17
dc.date2009-03-11
dc.date.accessioned2026-07-07T12:55:21Z
dc.date.available2026-07-07T12:55:21Z
dc.descriptionWe 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. Flavor-changing processes with massive spin-2 particles are also briefly discussed. These results can be generalized to the case of the lepton-graviton coupling.
dc.description21 pages, 2 figures. New results and two references added. To be published in PRD
dc.identifierhttps://arxiv.org/abs/0812.3262
dc.identifierhttp://arxiv.org/abs/0812.3262
dc.identifierPhys.Rev.D79:053004,2009
dc.identifierdoi:10.1103/PhysRevD.79.053004
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/224227
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectHigh Energy Physics - Theory
dc.titleFlavor Changing Fermion-Graviton Vertices
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