2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/40336Loop corrections for physics beyond the Standard Model are computed. DWe discuss the influence of new physics on CP-violating observables. Assuming the standard model gives a correct description of tree level processes, we show how a consistent procedure can determine the parameters of the standard model and check its validity also in loop induced processes. A method to include new physics in a systematic way is sketched.misprints (probably not all) and sentences corrected; older experimental numbers replaced by recent onesHigh Energy Physics - Phenomenologytext