http://dspace-roma3.caspur.it:80 The DSpace digital repository system captures, stores, indexes, preserves, and distributes digital research material. 2013-05-20T13:19:34Z http://hdl.handle.net/2307/332 <Title>Flavor changing fermion-graviton vertices</Title> <Authors>Degrassi, Giuseppe; Gabrielli, Emidio; Trentadue, Luca</Authors> <Issue Date>2009-03</Issue Date> <Is part of>Physical review D</Is part of> <Volume>79</Volume> <Pages>053004-1-053004-11</Pages> <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.</Abstract> 2009-02-28T23:00:00Z