Speaker
Diego Voces Porteiro
(Universidad Complutense de Madrid (UCM))
Description
Higher-derivative theories of gravity introduce powers of the Ricci scalar and Ricci tensor in the Hilbert-Einstein action in order to improve renormalizability at the cost of adding massive ghost-like particles. The muon anomalous magnetic moment, $a_\mu = \frac{( g_\mu -2 )}{2} $, given its precise measurement, is a perfect observable to test the viability of these theories and impose restrictions on these massive modes. We compute the one-loop graviton contribution to $a_\mu$ in fourth-derivative gravity. We show that said theory improves convergence with respect to General Relativity while also recovering the latter in the limit of large mass ghosts.
Author
Diego Voces Porteiro
(Universidad Complutense de Madrid (UCM))
Co-authors
Dr
José Alberto Ruiz Cembranos
(Universidad Complutense de Madrid (UCM))
Dr
Juan José Sanz Cillero
(Universidad Complutense de Madrid (UCM))