The Effective ${\eta }^{\prime }{g}^{\ast }{g}^{\ast }$ Vertex at Arbitrary Gluon Virtualities

A. Ali, A. Ya. Parkhomenko

The effective ${\eta }^{\prime }{g}^{\ast }{g}^{\ast }$ vertex is studied in the standard (Brodsky-Lepage) and modified hard scattering approaches for arbitrary gluon virtualities in the time-like and sp…