Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2004-01-16
Nucl.Phys. A739 (2004) 291-315
Physics
High Energy Physics
High Energy Physics - Phenomenology
27 pages, 9 figuures
Scientific paper
10.1016/j.nuclphysa.2004.04.107
We show that the Iancu-Mueller factorization has a simple interpretation in the Reggeon - like technique based on the BFKL Pomeron. The formula for calculating the high energy asymptotic behaviour for the colour dipole-dipole amplitude is proposed which suggests a procedure to calculate this amplitude through the solution to the Balitsky-Kovchegov non-linear equation. We confirm the Iancu - Mueller result that a specific set of enhanced diagrams is responsible for the high energy behaviour for fixed QCD coupling. However, it is argued that in the case of running QCD coupling, this asymptotic behaviour originates from the Balitsky-Kovchegov non-linear equation. A new solution to the non-linear equation is found which leads to a different asymptotic behaviour of the scattering amplitude even for fixed QCD coupling..
Kozlov Mikhail
Levin Eugene
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