Sense-Nonsense Channels in an ApproximateNDModel

Abstract

The decoupling of sense-nonsense Regge amplitudes at a physical angular momentum when external particles have spin is investigated. As discussed by Abers and Zachariasen, various approximation schemes to the $\frac{N}{D}$ matrix equations that are available do not seem to decouple the sense and nonsense channels in an appropriate manner. Here we show, through the specific example of vector-scalar scattering, than an approximate amplitude suggested earlier by the present authors seems to decouple properly. The amplitude, being unitary and symmetric (time-reversal invariant), and having the same degree of simplicity as (for example) the determinantal approximation, may be of use in rudimentary spinological bootstraps.