Cold nuclear matter effects on J/psi and UPSILON production at energies available at the CERN Large Hadron Collider (LHC)

Journal Article · Thu Apr 15 00:00:00 EDT 2010 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.81.044903· OSTI ID:21388954

Vogt, R ^[1]

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1. Lawrence Livermore National Laboratory, Livermore, California 94551 (United States) and Physics Department, University of California at Davis, Davis, California 95616 (United States)

The charmonium yields are expected to be considerably suppressed if a deconfined medium is formed in high-energy heavy-ion collisions. In addition, the bottomonium states, with the possible exception of the UPSILON(1S) state, are also expected to be suppressed in heavy-ion collisions. However, in proton-nucleus collisions the quarkonium production cross sections, even those of the UPSILON(1S), are also suppressed. These 'cold nuclear matter' effects need to be accounted for before signals of the high-density QCD medium can be identified in the measurements made in nucleus-nucleus collisions. We identify two cold nuclear matter effects important for midrapidity quarkonium production: 'nuclear absorption', typically characterized as a final-state effect on the produced quarkonium state, and 'shadowing', the modification of the parton densities in nuclei relative to the nucleon, an initial-state effect. In this article, we characterize these effects and study the energy, rapidity, and impact-parameter dependence of initial-state shadowing.

• OSTI ID: 21388954
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 81, Issue 4; Other Information: DOI: 10.1103/PhysRevC.81.044903; (c) 2010 The American Physical Society; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ABSORPTION
BOTTOMONIUM
CERN
CERN LHC
CHARMONIUM
COLLISIONS
CROSS SECTIONS
DENSITY
EXCEPTIONS
HEAVY ION REACTIONS
IMPACT PARAMETER
J PSI-3097 MESONS
MODIFICATIONS
NUCLEAR MATTER
NUCLEI
NUCLEON-NUCLEON INTERACTIONS
NUCLEONS
PARTICLE RAPIDITY
PROTON-NUCLEON INTERACTIONS
QUANTUM CHROMODYNAMICS
S STATES
ACCELERATORS
ADMINISTRATIVE PROCEDURES
BARYON-BARYON INTERACTIONS
BARYONS
BOSONS
CYCLIC ACCELERATORS
ELEMENTARY PARTICLES
ENERGY LEVELS
FERMIONS
FIELD THEORIES
HADRON-HADRON INTERACTIONS
HADRONS
INTERACTIONS
INTERNATIONAL ORGANIZATIONS
MATTER
MESONS
NUCLEAR REACTIONS
PARTICLE INTERACTIONS
PARTICLE PROPERTIES
PHYSICAL PROPERTIES
QUANTUM FIELD THEORY
QUARKONIUM
SORPTION
STORAGE RINGS
SYNCHROTRONS
VECTOR MESONS