Calculation of cross section in QED

25 Março 2026, 09:00 • José Maneira

Calculation of electron-positron annihilation cross section in QED.

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Interaction by particle exchange. QED.

23 Março 2026, 15:00 • José Maneira

 Charge conjugation and parity in the Dirac equation. Interaction by particle exchange and sum of time ordered amplitudes. Propagator.

Quantum electrodynamics. Feynman rules for QED.

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Spin and helicity in the Dirac equation.

18 Março 2026, 09:00 • José Maneira

Advancement of the T Program:

Commutation relations of the orbital angular momentum and spin with the Dirac Hamiltonian. States with momentum along z as eigenstates of spin. Definition of helicity and derivation of Dirac helicity eigenstates.

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Cross sections. Dirac equation.

16 Março 2026, 15:00 • José Maneira

Definition of cross section.  Expression of the two particle scattering cross-section in invariant form, and in the center-of-mass and lab frames.

Brief outline of the Dirac equation derivation and plane wave solutions.

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Exercise series 1 and 2

11 Março 2026, 09:00 • José Maneira

Solutions to the exercises of series 1 and 2. Interaction of particles with matter. Relativistic kinematics.

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