Askold DUVIRYAK
Institute for Condensed Matter Physics of NAS of Ukraine,
1 Svientsitskii Str.,
79011 Lviv,
UKRAINE
E-mail: duviryak@ph.icmp.lviv.ua

Large-j expansion method for two-body Dirac equation

Abstract:
Using symmetry properties the two-body Dirac equation in coordinate representation is reduced to the coupled pair of radial second-order differential equations. Then the large-j expansion technique is used to solve bound state problem. Linear-plus-Coulomb potentials of different spin structure are examined in order to describe the asymptotic degeneracy and fine splitting of meson spectra.