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8.851 Effective Field Theory

8.851 Effective Field Theory (Spring 2013, MIT OCW). Instructor: Professor Iain Stewart. Effective field theory is a fundamental framework to describe physical systems with quantum field theory. Part I of this course covers common tools used in effective theories: identifying degrees of freedom and symmetries; power counting expansions (dimensional and otherwise); field redefinitions; bottom-up and top-down effective theories; fine-tuned effective theories; matching and Wilson coefficients; reparameterization invariance; and advanced renormalization group techniques. Main examples are taken from particle and nuclear physics. Part II of this course is an in depth study of the Soft-Collinear Effective Theory (SCET), an effective theory for hard interactions in collider physics. (from ocw.mit.edu)

Lecture 18 - SCET Beyond Tree Level

In this lecture, the professor discusses gauge symmetry, and reparameterization invariance.


Go to the Course Home or watch other lectures:

Part I: Effective Field Theory (FET)
Lecture 01 - Introduction to Effective Field Theory (FET)
Lecture 02 - Dimensional Power Counting
Lecture 03 - Field Redefinitions
Lecture 04 - Matching and Decoupling
Lecture 05 - Classic Operator Renormalization Group Equations (RGE)
Lecture 06 - Chiral Lagrangians
Lecture 07 - Chiral Loops
Lecture 08 - Heavy Quark Effective Theory (HQET)
Lecture 09 - HQET Matching and Power Corrections
Lecture 10 - HQET Examples
Lecture 11 - Renormalons
Lecture 12 - More Renormalons
Lecture 13 - EFT with Fine Tuning
Lecture 14 - EFT with Fine Tuning Part 2
Part II: Soft-Collinear Effective Theory (SCET)
Lecture 15 - Soft-Collinear Effective Theory (SCET) Introduction
Lecture 16 - SCET Collinear Wilson Lines
Lecture 17 - SCET Multipole Expansion
Lecture 18 - SCET Beyond Tree Level
Lecture 19 - SCET Beyond Tree Level 2
Lecture 20 - SCET Wilson Coefficients
Lecture 21 - SCET Sudakov Logarithms
Lecture 22 - SCET for DIS
Lecture 23 - SCET for Dijets
Lecture 24 - SCETII
Lecture 25 - SCETII Rapidity RGE
Lecture 26 - SCET for LHC