Forward dijets in high-energy collisions: Evolution of QCD n-point functions beyond the dipole approximation

Journal Article · Fri Oct 01 00:00:00 EDT 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.82.074023· OSTI ID:21426363

Dumitru, Adrian ^[1]; Jalilian-Marian, Jamal ^[2]

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1. RIKEN BNL Research Center, Brookhaven National Laboratory, Upton, New York 11973 (United States)
2. Department of Natural Sciences, Baruch College, CUNY, 17 Lexington Avenue, New York, New York 10010 (United States)

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 Balitsky-Kovchegov-evolution equation. We employ the Jalilian-Marian-Iancu-McLerran-Weigert-Leonidov-Kovner 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{sub 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 Jalilian-Marian-Iancu-McLerran-Weigert-Leonidov-Kovner and Balitsky-Kovchegov approaches.

• OSTI ID: 21426363
• Journal Information: Physical Review. D, Particles Fields, Vol. 82, Issue 7; Other Information: DOI: 10.1103/PhysRevD.82.074023; (c) 2010 American Institute of Physics; ISSN 0556-2821
• Country of Publication: United States
• Language: English

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