Seminario di Fisica Teorica INFN/DIFI

Data inizio

09/04/2025 11:30

Data fine

09/04/2025 13:30

Luogo

Dipartimento di Fisica - A501

Relatori

Dott. Luca Vecchi
INFN Padova

Dimensional regularization is arguably the most popular and efficient scheme for loop calculations. Yet, when applied to chiral (gauge) theories like the Standard Model and its extensions, it leads to the infamous “gamma-5 problem”. The only formulation that has been demonstrated to be consistent at all orders in perturbation theory, the so-called Breiteinlohner-Maison-’t Hooft-Veltman scheme, manifestly breaks chiral gauge-invariance. We show that the introduction of auxiliary fields allows us to restore a spurious version of gauge-invariance, and thus take full advantage of all the symmetries of the theory.