Sala Seminarios IFIC (Edf. Institutos de Investigación)
Sala Seminarios IFIC
Edf. Institutos de Investigación
Descripción
We discuss the calculation of the NNLO corrections to the photon energy spectrum in the rare B -> X_s gamma decay in the Standard Model. The leading corrections to the spectrum, coming from the interference of graphs including the magnetic dipole operator O_7, were calculated independently by two groups and they were recently included in the first estimate of the B -> X_s gamma branching ratio at NNLO. The calculation of corrections to the spectrum coming from other operators is currently under way.