Four-point vector correlators and AdS/QCD correspondence
M. Konyushikhin
SUBATECH, Université de Nantes, 44307 Nantes, France
Institute for Theoretical and Experimental Physics, 117259 Moscow, Russia
Abstract
We derive the four-point vector correlators in QCD from AdS/QCD
correspondence. It is shown that meson poles are correctly reproduced. The
final expression also suggests a nonzero amplitude in the limit of zero
virtuality of two longitudinal photons. This fact does not mean that one can
produce, absorb or scatter real longitudinal photons.