Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2004-08-30
Nucl.Phys.A748:649-663,2005
Physics
High Energy Physics
High Energy Physics - Phenomenology
17 pages, 10 figures
Scientific paper
10.1016/j.nuclphysa.2004.11.011
Higher order corrections to the Balitsky-Kovchegov equation have been estimated by introducing a rapidity veto which forbids subsequent emissions to be very close in rapidity and is known to mimic higher order corrections to the linear BFKL equation. The rapidity veto constraint has been first introduced using analytical arguments obtaining a power growth with energy, Q_s (Y) ~ exp(lambda Y), of the saturation scale of lambda ~ 0.45. Then a numerical analysis for the non-linear Balitsky-Kovchegov equation has been carried out for phenomenological rapidities: when a veto of about two units of rapidity is introduced for a fixed value of the coupling constant of alpha_s = 0.2 the saturation scale lambda decreases from ~ 0.6 to ~ 0.3, and when running coupling effects are taken into account it decreases from ~ 0.4 to ~ 0.3.
Chachamis Grigorios
Lublinsky Michael
Vera Agustin Sabio
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