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Columbia University
Department of Physics Theory Seminar
“An IR Perspective on Effective Lagrangians for
Nonlinear Sigma Models”
Long ago Coleman, Callan, Wess and Zumino (CCWZ) constructed the nonlinear
sigma model lagrangian based on the coset G/H. I discuss how CCWZ lagrangian
can be (re)derived using nonlinear shift symmetries. The resulting lagrangian only
depends on how the Goldstone boson transforms under the unbroken group H in
the IR, and is universal among all possible G in the UV.
Ian Low, Northwestern University
Monday, March 30, 2015 / 705 Pupin Hall / 2:10 PM