Heavy-quarkonium production in high energy proton-proton collisions at RHIC

Journal Article · Mon Mar 01 04:00:00 EST 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.81.051502· OSTI ID:21409809

Brodsky, Stanley J ^[1]; Lansberg, Jean-Philippe ^[1]

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1. SLAC National Accelerator Laboratory, Theoretical Physics, Stanford University, Menlo Park, California 94025 (United States)

We update the study of the total {psi} and {Upsilon} production cross section in proton-proton collisions at RHIC energies using the QCD-based color-singlet model, including next-to-leading order partonic matrix elements. We also include charm-quark initiated processes which appear at leading order in {alpha}{sub s}, so far overlooked in such studies. Contrary to earlier claims, we show that the color-singlet yield is consistent with measurements over a broad range of J/{psi} rapidities. We find that intrinsic plus sealike charm-initiated processes contribute more than 20% of the direct J/{psi} yield. The key signature for such processes is the observation of a charm-quark jet opposite in azimuthal angle {phi} to the detected J/{psi}. Our results have impact on the proper interpretation of heavy-quarkonium production in heavy-ion collisions and its use as a probe for the quark-gluon plasma.

• OSTI ID: 21409809
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 5 Vol. 81; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATORS
BARYON-BARYON INTERACTIONS
BOSONS
BROOKHAVEN RHIC
CHARMONIUM
COLOR MODEL
COMPOSITE MODELS
CROSS SECTIONS
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
HADRON-HADRON INTERACTIONS
HADRONS
HEAVY ION ACCELERATORS
HEAVY ION REACTIONS
INTERACTIONS
J PSI-3097 MESONS
MATHEMATICAL MODELS
MATRIX ELEMENTS
MATTER
MESONS
NUCLEAR REACTIONS
NUCLEON-NUCLEON INTERACTIONS
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PROPERTIES
PARTICLE RAPIDITY
PROTON-NUCLEON INTERACTIONS
PROTON-PROTON INTERACTIONS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARK MATTER
QUARK MODEL
QUARKONIUM
QUARKS
STORAGE RINGS
VECTOR MESONS