High-energy quark-antiquark elastic scattering with mesonic exchange.

We studied the high energy elastic scattering of quark anti-quark with an exchange of a mesonic state in the t channel with −t/Λ 2 ≫ 1. Both the normalization factor and the Regge trajectory can be calculated in PQCD in cases of fixed (non-running) and running coupling constant. The dependence of the Regge trajectory on the coupling constant is highly non-linear and the trajectory is of order of 0.2 in the interesting physical range.