Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-08-03
Phys.Rev.D82:074023,2010
Physics
High Energy Physics
High Energy Physics - Phenomenology
8 pages, 1 figure
Scientific paper
10.1103/PhysRevD.82.074023
Present knowledge of QCD n-point functions of Wilson lines at high energies is rather limited. In practical applications, it is therefore customary to factorize higher n-point functions into products of two-point functions (dipoles) which satisfy the BK evolution equation. We employ the JIMWLK formalism to derive explicit evolution equations for the 4- and 6-point functions of fundamental Wilson lines and show that if the Gaussian approximation is carried out before the rapidity evolution step is taken, then many leading order N_c contributions are missed. Our evolution equations could specifically be used to improve calculations of forward dijet angular correlations, recently measured by the STAR collaboration in deuteron-gold collisions at the RHIC collider. Forward dijets in proton-proton collisions at the LHC probe QCD evolution at even smaller light-cone momentum fractions. Such correlations may provide insight into genuine differences between the JIMWLK and BK approaches.
Dumitru Adrian
Jalilian--Marian Jamal
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