Resonant states 3(+) and 2(-) of the Boron isotope B-8

The Jost functions, constructed by fitting available partial cross-sections for the elastic p Be-7 scattering with J(pi) = 3(+), 2(-), are analytically continued to complex energies, where the resonances are located as their zeros. In addition to the resonance energies and widths, the residues of the S-matrix at the corresponding poles, as well as the Asymptotic Normalization Constants (ANC) are determined. The fitting is done using the semi-analytic representation of the Jost function with proper analytic structure, defined on the Riemann surface whose topology involves not only the square-root but also the logarithmic branching caused by the Coulomb interaction.