Solving effective field theory of interacting QCD pomerons in the semi-classical approximation

Details Solving effective field theory of interacting QCD pomerons in the semi-classical approximation Solving effective field theory of interacting QCD pomerons in the semi-classical approximation

2006-05-16

arxiv.org/abs/hep-ph/0605185v2

Phys.Rev.D75:114015,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

References added, misprints corrected

Scientific paper

10.1103/PhysRevD.75.114015

Effective field theory of BFKL pomerons interacting by QCD triple pomeron vertices is investigated. Classical equations of motion for the effective pomeron fields are presented being a minimal extension of the Balitsky-Kovchegov equation that incorporates both merging and splitting of the pomerons and that is self-dual. The equations are solved for symmetric boundary conditions. The solutions provide the dominant contribution to the scattering amplitudes in the semi-classical approximation. We find that for rapidities of the scattering larger than a critical value Y_c at least two classical solutions exist. Curiously, for each of the two classical solutions with the lowest action the symmetry between the projectile and the target is found to be spontaneously broken, being however preserved for the complete set of classical solutions. The solving configurations at rapidities Y>Y_c consist of a Gribov field being strongly suppressed even at very large gluon momenta and the complementary Gribov field that converges at high Y to a solution of Balitsky-Kovchegov equation. Interpretation of the results is given and possible consequences are shortly discussed.

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