Please use this identifier to cite or link to this item: http://hdl.handle.net/2307/332
Title: Flavor changing fermion-graviton vertices
Authors: Degrassi, Giuseppe
Gabrielli, Emidio
Trentadue, Luca
Keywords: QUANTUM-ELECTRODYNAMIC CORRECTIONS
GRAVITATIONAL INTERACTION
RADIATIVE-CORRECTIONS
DIMENSIONS
MILLIMETER
INTEGRALS
ELECTRON
VERTEX
PHOTON
MASS
Issue Date: Mar-2009
Publisher: The American Physical Society
Abstract: We study the flavor-changing quark-graviton vertex that is induced atthe one-loop level when gravitational interactions are coupled to thestandard model. Because of the conservation of the energy-momentumtensor the corresponding form factors turn out to be finite and gaugeinvariant. Analytical expressions of the form factors are provided atleading order in the external masses. We show that flavor-changinginteractions in gravity are local if the graviton is strictly masslesswhile if the graviton has a small mass long-range interactions inducinga flavor-changing contribution in the Newton potential appear.Flavor-changing processes with massive spin-2 particles are alsobriefly discussed. These results can be generalized to the case of thelepton-graviton coupling.
URI: http://hdl.handle.net/2307/332
ISSN: 1550-7998
DOI: 10.1103/PhysRevD.79.053004
Appears in Collections:A - Articolo su rivista
X_Dipartimento di Fisica 'Edoardo Amaldi'

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