Eur. Phys. J. C 18, 523-529
DOI: 10.1007/s100520100495

Photon polarization operator and quantum transitions in QCD vacuum

Sh. Mamedov

High Energy Physics Laboratory, Baku State University, 23 Z. Khalilov, 370148 Baku, Azerbaijan

shahin2@usa.net

(Received: 20 July 2000 / Published online: 21 December 2000 - © Springer-Verlag 2000)

Abstract
The analytical properties of the photon polarization operator in the quark vacuum was analyzed. Branching points of the polarization operator were found and its imaginary part was calculated. Quantum transitions between quark states and the turning over of a quark's color spin in a chromomagnetic field were predicted. The negative values of the photon energy and the contribution of the photon zero energy to the branching point were taken into account

© Società Italiana di Fisica, Springer-Verlag 2001