Two-particle correlations in high-energy collisions and the gluon four-point function

Journal Article · Sat May 01 00:00:00 EDT 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.81.094015· OSTI ID:21415204

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)

We derive the rapidity evolution equation for the gluon four-point function in the dilute regime and at small x from the JIMWLK functional equation. We show that beyond leading order in N{sub c} the mean field (Gaussian) approximation where the four-point function is factorized into a product of two-point functions is violated. We calculate these factorization breaking terms and show that they contribute at leading order in N{sub c} to correlations of two produced gluons as a function of their relative rapidity and azimuthal angle, for generic (rather than back-to-back) angles. Such two-particle correlations have been studied experimentally at the BNL-RHIC collider and could be scrutinized also for pp (and, in the future, also AA) collisions at the CERN-LHC accelerator.

• OSTI ID: 21415204
• Journal Information: Physical Review. D, Particles Fields, Vol. 81, Issue 9; Other Information: DOI: 10.1103/PhysRevD.81.094015; (c) 2010 The American Physical Society; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

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APPROXIMATIONS
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BROOKHAVEN RHIC
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COLLISIONS
CORRELATIONS
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FACTORIZATION
GLUONS
MEAN-FIELD THEORY
PARTICLE RAPIDITY
PARTICLES
PROTON-PROTON INTERACTIONS
ACCELERATORS
BARYON-BARYON INTERACTIONS
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HEAVY ION ACCELERATORS
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PARTICLE INTERACTIONS
PARTICLE PROPERTIES
PROTON-NUCLEON INTERACTIONS
STORAGE RINGS
SYNCHROTRONS
US AEC
US DOE
US ERDA
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