RENORMALIZABILITY. NON-RENORMALIZABLE THEORIES.THE STANDARD MODEL.
1. RENORMALIZABILITY.
Renormalizability of QED. Non-renormalizable field theories. The Schrodinger Equation. The 4-Fermi theory. Theory of mesons.
Quantum gravity. Summary of non-renormalizable theories. Mass terms and naturalness. Super-renormalizable theories.
2. The Standard Model. Yang-Mills theory. Lie Groups. Gauge invariance and Wilson lines. Conserved Currents. Gluon propagator. Lattice gauge theories.
3. Quantum Yang Mills Theory.
Feynman rules. Attractive and repulsive potentials. e^(+)e^(-)>Hadrons and \alpha_s
Vacuum polarization. Renormalization at 1 loop. Running coupling. Defining the charge.
4. Gluon Scattering and spinor-helicity formalism.
Spinor-helicity formalism. Gluon Scattering amplitudes.gg>gg.
Color ordering. Complex Momenta. On-shell recursion.
5. Spontaneous Symmetry Breaking.
Spontaneous breaking of discrete symmetries. Spontaneous breaking of continuous global symmetries. The Higgs Mechanism. Quantization of spontaneously broken gauge theories.
6. Week Interaction.
Electroweak Symmetry Breaking. Unitarity and gauge boson scattering.
Fermion sector. The 4-Fermi theory. CP violation.
7. Anomalies.
Pseudoscalars decaying to photons. Triangle diagrams with massless fermions. Chiral anomaly from the integral measure. Gauge anomalies in the Standard Model. Global anomalies in the Standard Model. Anomaly matching.
8. Precision tests of the Standard Model.
Electroweak precision tests. Custodial SU(2), p, S, T and U. Large logarithms in flavor physics.
9. Quantum chromodynamics and the parton model.
Electron-proton scattering. DGLAP equations. Parton showers. Factorization and the parton model from QCD. Lightcone coordinates.
Renormalizability of QED. Non-renormalizable field theories. The Schrodinger Equation. The 4-Fermi theory. Theory of mesons.
Quantum gravity. Summary of non-renormalizable theories. Mass terms and naturalness. Super-renormalizable theories.
2. The Standard Model. Yang-Mills theory. Lie Groups. Gauge invariance and Wilson lines. Conserved Currents. Gluon propagator. Lattice gauge theories.
3. Quantum Yang Mills Theory.
Feynman rules. Attractive and repulsive potentials. e^(+)e^(-)>Hadrons and \alpha_s
Vacuum polarization. Renormalization at 1 loop. Running coupling. Defining the charge.
4. Gluon Scattering and spinor-helicity formalism.
Spinor-helicity formalism. Gluon Scattering amplitudes.gg>gg.
Color ordering. Complex Momenta. On-shell recursion.
5. Spontaneous Symmetry Breaking.
Spontaneous breaking of discrete symmetries. Spontaneous breaking of continuous global symmetries. The Higgs Mechanism. Quantization of spontaneously broken gauge theories.
6. Week Interaction.
Electroweak Symmetry Breaking. Unitarity and gauge boson scattering.
Fermion sector. The 4-Fermi theory. CP violation.
7. Anomalies.
Pseudoscalars decaying to photons. Triangle diagrams with massless fermions. Chiral anomaly from the integral measure. Gauge anomalies in the Standard Model. Global anomalies in the Standard Model. Anomaly matching.
8. Precision tests of the Standard Model.
Electroweak precision tests. Custodial SU(2), p, S, T and U. Large logarithms in flavor physics.
9. Quantum chromodynamics and the parton model.
Electron-proton scattering. DGLAP equations. Parton showers. Factorization and the parton model from QCD. Lightcone coordinates.
Lecturer
Hrachya Babujyan
Date
17th March ~ 15th May, 2026
Audience
Graduate
Video Public
Yes
Notes Public
Yes
Language
English
Lecturer Intro
Hrachya Babujian (Babujyan) received his PhD from L. D. Landau Institute of Theoretical Physics in Moscow, where he was PhD student of A.A. Belavin. The Habilitation he get in Yerevan Physics Institute (Alikhanyan National Lab) where he currently holds the title Leading Scientific Researcher. In the 1990’s he was working in Bonn University and Berlin FU where he enjoy the Mathematical Physics group of R. Schrader. He also work in Sao Carlos University (Brazil) in Brookhaven National Lab, Simons Center and Chicago University. H. Babujian’s research interests are in Integrability in 2d statistical models and 1+1 dimensional quantum field theories, 1d spin chains, conformal blocks, form factors and thermodynamics of integrable models. Now his interest is the applications of the exact form factors in 1+3 dimensional lepton-hadron scattering in small Bjorkan x case.