High energy evolution beyond the Balitsky-Kovchegov equation Academic Article uri icon


  • M. LUBLINSKY Department of Physics, U-3046, University of Connecticut 2152 Hillside Rd., Storrs, CT-06269, USA E-mail: lublinm@mail.desy.de … We present a short review of recent theoretical activity which is an attempt to learn about low x evolution beyond the Balitsky - Kovchegov equation … The Balitsky - Kovchegov equation (BK) [1, 2, 3, 4, 5] is the best presently available tool to study saturation phenomena at high energies. Contrary to many models the BK has solid grounds in perturbative QCD. The equation reads … (2 N(x02,y; b − 1 2 x12) − N(x01,y; b) − N(x02,y; b − 1 2 x12)N(x12,y; b − 1 2 x02)) … The function N(r⊥,y; b) stands for imaginary part of the amplitude for a dipole of size r⊥ = x10 elastically scattered at the impact parameter b. Eq. (1) has a simple meaning: the dipole of size x10 decays in two dipoles of sizes x12 and x02 with the decay probability x2 01 x2 02 x2 12 . These two dipoles then interact with the …

publication date

  • November 29, 2004