High-Energy Behavior in a Nonabelian Gauge Theory (II)

In this second part of our attempt to construct a unitary high-energy description of a spontaneously broken non-abelian gauge theory we calculate, for the n → m amplitude in the multi-Regge limit, the first corrections beyond the leading logarithmic approximation. The resulting amplitudes come in the form of the reggeon calculus where the number of reggeons in each t -channel is restricted to one or two. We then study the limit where the mass of the vector particle is taken to zero: for the 2→2 amplitude we show that this limit exists, not only for the approximation of the present paper but also for higher-order corrections