Multichannel reactions using the adiabatic expansion method

In this work we describe a method to study scattering processes. The method, which is based on the Kohn Variational Principle, has been generalized to be applicable for calculating any partial wave phase shift and studying multichannel processes. It shows fast convergence when applied to three-body reactions described with the hyperspherical adiabatic method. The pattern of convergence is similar to the one found when the method is applied to obtain bound states.