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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 08 - Heavy Quark Effective Theory (HQET)

This lecture discusses QCD to HQET, velocity labels, power counting, heavy quark symmetry, spectroscopy, covariant superfields, and starts loops.


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