ИСТИНА

In quantum theory, amplitudes of the processes are analytic functions of their kinematic variables. The analyticity property of the amplitudes allows, in principle, to continue experimental data into the regions that have not been studied in the experiment, including unphysical domains. Oneof the most important nuclear characteristics that cannot be directly measured in an experiment is the asymptotiс normalization сorfficent (ANC). In the present work, we discuss two ways to obtain information about ANCs by analytic continuation of experimental data into unphysical domains.