Physical Review D
At high energies, the relevant degrees of freedom are Wilson lines—infinite gauge links ordered along straight lines collinear to the velocities of colliding particles. The effective action for these Wilson lines is determined by the scattering of QCD shock waves. I develop the symmetric expansion of the effective action in powers of strength of one of the shock waves and calculate the leading term of the series. The corresponding first-order effective action, symmetric with respect to projectile and target, includes both up and down fan diagrams and pomeron loops.
Original Publication Citation
Balitsky, I. (2005). High-energy effective action from scattering of QCD shock waves. Physical Review D, 72(7), 1-17, Article 074027. https://doi.org/10.1103/PhysRevD.72.074027
Balitsky, Ian, "High-Energy Effective Action From Scattering of QCD Shock Waves" (2005). Physics Faculty Publications. 605.