T-2, Nuclear and Particle Physics, Astrophysics and Cosmology

Effective Field Theory; from pions to gravitons

John F. Donoghue
Univ. of Mass., Amherst

Effective field theory has become a useful technique. It entails ides -- such as renormlizing a non-renormalizable theory -- thatvrarely make it into classic texts, yet are pretty intuitive. I will review the basic ideas and illustrate them using effective field theory of pions in QCD. Given this development, it will be easy to see that general relativity fits the paradigm of an effective field theory. I will then give an example of a reliable calculation of quantum gravity -- the quantum correction to the Newtonian potential.


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