1208.1209 (Yuri Makeenko)

Scattering Amplitudes of QCD String    [PDF]

Yuri Makeenko

I review the derivation of large-N QCD meson scattering amplitudes in the Regge regime, where the effective theory of long strings applies in d=4. A special attention is payed to the reparametrization path integral which plays a crucial role in the consistency of off-shell amplitudes. I show how the linear Reggeon trajectory is obtained for QCD string in the mean-field approximation, which turns out to be exact for the Nambu-Goto string, and discuss the interrelation with perturbative QCD.

View original: http://arxiv.org/abs/1208.1209