Spectrum in the broken phase of a $\lambda {\varphi }^4$ theory

Abstract

We derive the spectrum in the broken phase of a $\lambda {\varphi }^4$ theory, in the limit $\lambda \to \infty$, showing that this goes as even integers of a renormalized mass in agreement with recent lattice computations.

Comments: 4 pages, 1 figure. Accepted for publication in International Journal of Modern Physics A