Università Roma Tre

Feynman diagrams. Tree-level processes. Discrete symmetry
Feynman diagrams and cross-sections. Bhabha and Compton scattering. Gauge invariance.
Chiral and Majorana representations for the matrices. Parity, charge conjugation and time-reversal.

Radiative Corrections
Divergent behavior of an integral. Primitively divergent diagrams. Pauli-Villars regularization.
Coupling, mass and wave-function renormalization in a scalar theory.
QED.
Ward identity. Dimensional regularization. Vacuum polarization and Lamb shift.
Running of the coupling constant. Bremsstrahlung, infrared divergencies and their cancellation between real and virtual contributions.

Non Abelian Gauge Theories
Yang-Mills Lagrangian. QCD. Non Abelian gauge invariance. Running of the strong coupling. Asymtotic freedom.
Weak Interactions.
Fermi and IVB theories. W propagator. mu decay. Standard Model Lagrangian. Weak angle.
Spontaneous symmetry breaking and Higgs mechanism. Mass of the intermediate vector bosons.
CKM matrix

F. Mandl, G. Shaw: Quantum Field Theory, ed. John Wiley & Sons;
M. Peskin, D. Shroeder: An Introduction to Quantum Field Theory, ed. Frontiers in
Physics