Resonances in Positron Hydrogen Scattering above the H (n = 2) Threshold.

We investigate high partial wave resonances in positron-hydrogen scattering using the momentum-space coupledchannels optical method above the H (n = 2) threshold. Resonances with angular momenta of L = 0-6 are reported. Ionization continuum and positronium formation channels are included via a complex equivalent local potential. Comparisons with the existing theoretical results are presented. [ABSTRACT FROM AUTHOR]