Sumários

Series 3 : QED

8 Março 2021, 11:30 • Nuno Barros

Discussion of QED exercises sent to be solved at home.

Review of Feynman rules and interpretation of diagrams.

Discussion of rules for upcoming solve-at-home exercise series.

QED (II)

8 Março 2021, 09:00 • Nuno Barros

Resuming of last class:

  • Feynman rules (Example 2): annihilation and pair production
  • Spin and chirality in QED
Trace techniques
  • Trace formalism
  • Trace theorems
  • Revisiting the process e+e− → μ+μ−
  • Crossing symmetry

Series 2: Dirac Equation

1 Março 2021, 11:30 • Nuno Barros

Resume of unsolved exercises from series 1.

Discussion of exercises about the Dirac Equation. Clarification of questions about the topic. 

QED

1 Março 2021, 09:00 • Nuno Barros


Introduction to QED

  • Interaction by particle exchange
    • Time-ordering and propagator 
    • Virtual particles
  • QED
    • Introduction
    • Feynman rules
  • Example 1: scattering

Discussion with students about evaluation method. Agreed to change weights to increase continuous evaluation.


Series 1 : Detectors and cross sections

22 Fevereiro 2021, 11:30 • Nuno Barros

Discussion of the first series of exercise. Most students didn't solve at home, prompting the rescheduling of a part of the series to the next tutorial (TP) class.