Suppression exponent for multiparticle production in $\lambda {\varphi }^4$ theory

S. V. Demidov, B. R. Farkhtdinov, D. G. Levkov

We compute the probability of producing $n$ particles from few colliding particles in the unbroken $(3+1)$-dimensional $\lambda {\varphi }^4$ theory. To this end we numerically implement semiclass…