Planning of the Lectures

The program of the discipline coincides with the text book . This text at the moment is mostly in Portuguese.

Aula Program
The pages numbers indicated are from the text, Introdução à Teoria do Campo by Jorge C. Romão, New edition for the academic year 2015/2016.
1ª Week
(15/2 a 19/2)
Lecture 1 Presentation of the course: Program, bibliography and evaluation method.
Lecture 2 Chapter 1 Relativistic Quantum Mechanics
Dirac Equation. Covariance of the Dirac equation. Bilinear covariants. Natural system of units. The spin and the Dirac equation. Pags. 9-28.
2ª Week
(22/2 a 26/2)
Lecture 3 Solutions for the free particle. Spin. Projectors. Charge conjugation. Antiparticles. Dirac and Feynman-Stuckelberg interpretation of the antiparticles. Pags. 28-41.
Lecture 4 Spin and helicity. Equation for spin 1/2 massless particles. Minimal coupling. Lagrangian density and equations of Euler-Lagrange. Non relativistic limit of the Dirac equation. Pags. 42-55.
END of Chapter 1.
3ª Week
(29/2 a 4/3)
Lecture 5 Chapter 2 Propagators and Green Functions
The non-relativistic propagator. Free propagators for the Dirac equation. S Matrix. Coulomb scattering. Pags. 75-88
END of Chapter 2
Lecture 6 No class. (Jornadas MEFT)
Series 1 Problem series on chapters 1 and 2. Due on the 8/4/2016.
4ª Week
(7/3 a 11/3)
Lecture 7 Chapter 3 Feynman Rules for QED
Coulomb scattering. Coulomb cross section for electrons. Theorems on the traces of gamma matrices. Pags. 89-96.
Lecture 8 Explicit spin sums on the helicity basis. Coulomb scattering for positrons. Elastic electron-muon scattering. Pags. 96-104
5ª Week
(14/3 a 18/3)
Lecture 9 Elastic electron-muon scattering. Elastic electron-muon scattering in second order in perturbation theory. Pags. 104-112
Lecture 10 Compton scattering. Feynman Rules for QED. Pags. 110-115
END of Chapter 3 .
Chapter 4 S-Matrix. Wick's Theorem. Feynman Rules
The Schrödinger, Heisenberg and Interaction pictures. Summary of the second quantized free fields. The real scalar field. Pags. 127-132
Week da Páscoa
(21/3 a 25/3 )
Easter Holidays
Easter Holidays
6ª Week
(28/3 a 1/4)
Lecture 11 Summary of the second quantized free fields (continuation) Pags. 132-142.
Lecture 12 S Matrix. Wick Theorem. Pags. 142-147
7ª Week
(4/4 a 8/4)
Lecture 13 Feynman Rules from the second quantization formalism. Pags. 148-162.
END of Chapter 4 .
Lecture 14 Chapter 5 Simple processes in QED
Calculation of the Compton scattering cross section. Calculation of the scattering electron-positron -> muon-anti-muon. Pags 165-176
8ª Week
(11/4 a 15/4)
Lecture 15 Scattering electron-positron -> muon-anti-muon with helicity methods. Pags 176-179
Lecture 16 Bhabha scattering. Bremsstrahlung. Pags 180-187
Series 2 Problem series on Chapters 3 to 6. Due on the 20/5/2016.
9ª Week
(18/4 a 22/4)
Lecture 17 Helicty amplitudes. 187-204
Lecture 18 Lecture on software programs used to make calculations in field theory: FeynCalc, calchep and qgraf (using the Bhabha scattering in QED as an example).
END of Chapter 5 .
10ª Week
(25/4 a 29/4)
Lecture 19 Chapter 6 Simple Examples in the Standard Model
Introduction to the Standard Model of ElectroWeak Interactions. Propagators, chaged and neutral currents. decay width of the Z0 into fermions. The helicy amplitudes method for the decay of the Z0 into fermions: cases with and without mass. Pags. 215-227
Lecture 20 Scattering electron-positron -> muon-antimuon in the Standard Model. The decay of the muon. Pags. 227-235.
END of Chapter 6 .
11ª Week
(2/5 a 6/5)
Lecture 21 Chapter 7 Radiative Corrections
1-loop renormalization: Self-energy of the photon (vacuum polarization). Dimensional regularization. Feynman parameterization. Wick rotation. Divergences as poles i«og the Gamma function. Pags. 257-262
Lecture 22 Practical Lecture on the installation and use of the software (with computers).
12ª Week
(9/5 a 13/5)
Lecture 23 1-loop renormalization: Self-energy of the photon (continuation). Counter terms and renormalization. Pags. 262-268
Lecture 24 1-loop renormalization: Self-energy of the eelctron. Renormalization of the vertice in QED. Power conting. Renormalizable theories. Pags. 268-282
13ª Week
(16/5 a 20/5)
Lecture 25 Finite contributions from the renormalization: Anomalous magnetic moment of the electron. The cancelling of the infrared divergence in the Coulomb scattering. Pags. 282-291
END of Chapter 7 .
Lecture 26 The decay H -> photon + photon in the Standard Model: Example of a complete non trivial calculation.
Homework Individual Homework will be available on the 22/05/2016. Due on the 30/05/2016.
14ª Week
(23/5 a 27/5)
Lecture 27 Topic to be announced
Lecture 28 Topic to be announced



Jorge Romao
2016-06-30