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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. Part II is an in depth study of the Soft-Collinear Effective Theory (SCET), an effective theory for hard interactions in collider physics.

36 hours of video.

26 lectures.


Text and References

There is no required textbook. Some of the reading will be taken from the following texts.


Professor Stewart joined the Physics faculty at MIT in January of 2003, and was promoted to Associate Professor with tenure in 2009.  Before that he was a Research Assistant Professor with the Institute for Nuclear Theory at the University of Washington in 2002, and a postdoctoral research associate at the University of California, San Diego from 1999–2001.  Dr. Stewart received his Ph.D. from the California Institute of Technology in 1999. He earned a Masters degree in Physics from the University of Manitoba, Canada in 1995, as well as an Honors B.Sc. degree there in Physics and Mathematics in 1994.

Source:MIT page

Effective Field Theory by Prof. Iain Stewart is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
Based on a work at

Course content

  • Lecture 1: Introduction to Effective Field Theory (EFT)

  • Lecture 2: Dimensional Power Counting

  • Lecture 3: Field Redefinitions

  • Lecture 4: Matching and Decoupling

  • Lecture 5: Classic Operator Renormalization Group Equations (RGE)

  • Lecture 6: Chiral Lagrangians

  • Lecture 7: Chiral Loops

  • Lecture 8: Heavy Quark Effective Theory (HQET)

  • Lecture 9: HQET Matching & 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

  • 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: SCET_2 Rapidity RGE

  • Lecture 26: SCET for LHC

  • Lecture Notes

  • Assignments

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