Sumários

Decays and collisions

2 Junho 2022, 18:00 • Luís Bento

Kinematic relations, Fermi golden rule, derivation of the expressions for the decay rates and collision cross sections.

Derivation of the vertices for a fermion anomalous magnetic moment and charged scalar minimal coupling electromagnetic interactions. Gordon identity. Compton effect and electron-positron annihilation amplitudes.

Feynman rules

20 Maio 2022, 11:00 • Luís Bento

Massive vector boson. Photon propagator in the Coulomb gauge and in an arbitrary gauge. Electron-muon scattering amplitude, verification of the no contribution of photon momentum tensor dependent terms in the photon propagator.

Feynman rules

18 Maio 2022, 11:00 • Luís Bento

Derivation of the Feynman rules for the vertices of electromagnetic and weak interactions. Polarization vectors of massive vector bosons and photons. Transformation of photon polarization vectors under gauge transformations, invariance of transition amplitudes. Diagrams and transition amplitude for the Compton effect.

Feynman rules

13 Maio 2022, 11:00 • Luís Bento

Application of the perturbation theory to the Yukawa interaction. Derivation of the transition amplitude for the fermion anti-fermion annihilation process. Real and complex scalar boson propagators.