Tasi 2009 lectures: The Higgs as a Composite Nambu-Goldstone Boson

Abstract

This is an introduction to theories where the Higgs is a composite Nambu-Goldstone boson of a new strongly-interacting dynamics not much above the weak scale. A general discussion is presented based on the pattern of global symmetries at low energy, and the analogy with the QCD pion is analyzed. The last part of the lectures shows how a composite Higgs can emerge as the hologram of a 5-dimensional gauge field.

Lectures given at the Theoretical Advanced Study Institute in Elementary Particle Physics (TASI 2009): Physics of the Large and the Small, Boulder, Colorado, 1-29 Jun 2009