Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2002-01-30
Nucl.Phys.B634:291-308,2002
Physics
High Energy Physics
High Energy Physics - Phenomenology
15 pages,3 eps figures; Version to be published in Nucl.Phys.B., one more figure, writing improvements, results and conclusion
Scientific paper
10.1016/S0550-3213(02)00314-0
We show that, in onium-onium scattering at (very) high energy, a transition to saturation happens due to quantum fluctuations of QCD dipoles. This transition starts when the order $\alpha^2$ correction of the dipole loop is compensated by its faster energy evolution, leading to a negative interference with the tree level amplitude. After a derivation of the the one-loop dipole contribution using conformal invariance of the elastic 4-gluon amplitude in high energy QCD, we obtain an exact expression of the saturation line in the plane (Y,L) where Y is the total rapidity and L, the logarithm of the onium scale ratio. It shows universal features implying the Balitskyi - Fadin - Kuraev - Lipatov (BFKL) evolution kernel and the square of the QCD triple Pomeron vertex. For large L, only the higher BFKL Eigenvalue contributes, leading to a saturation depending on leading log perturbative QCD characteristics. For initial onium scales of same order, however, it involves an unlimited summation over all conformal BFKL Eigenstates. In all cases, conformal invariance is preserved for the saturation mechanism based on dipole loops.
Navelet H.
Peschanski Robert
No associations
LandOfFree
Conformal invariant saturation does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Conformal invariant saturation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Conformal invariant saturation will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-583964