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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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