On Infrared Universality in Massive Theories. Another Example

Abstract

The infrared behaviour of the ${\varphi }^3$-theory is discussed stressing analogies with the Witten-Seiberg story about $N=2$ $QCD$. Though the microscopic theory is apparently not integrable, the effective theory is shown to be integrable at classical level, and a general solution of it in terms of hypergeometric functions is obtained. An effective theory for the multiparticle soft scattering is sketched.

Comments: 9 pages, Latex, ps is available at http://venus.itep.ru/preprints/1996/96016.ps.gz