J/{psi} production in indium-indium collisions at SPS energies

Journal Article · Thu Jan 12 00:00:00 EST 2006 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2163775· OSTI ID:20787651

Pillot, P; Ducroux, L; Guichard, A; Tieulent, R ^[1]; CNRS-IN2P3, Lyon ^[2]; Arnaldi, R; Colla, A; Cortese, P; Ferretti, A; Oppedisano, C; Scomparin, E ^[3]; INFN, ^[4]; Averbeck, R; Drees, A ^[5]; Banicz, K; Keil, M ^[6]; Castor, J; Devaux, A; Force, P; Manso, F ^[7] ; CNRS-IN2P3, Clermont-Ferrand ^[2]; Chaurand, B ^[8]; Cicalo, C ^[9]; INFN, Cagliari ^[10]

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1. IPN-Lyon, Univ. Claude Bernard Lyon-I, Lyon (France)
2. France
3. Univ. di Torino (Italy)
4. Italy
5. SUNY Stony Brook, New York (United States)
6. CERN, Geneva (Switzerland)
7. LPC, Univ. Blaise Pascal, Clermont-Ferrand (France)
8. LLR and CNRS-IN2P3, Palaiseau (France)
9. Univ. di Cagliari, Cagliari (Italy)
10. Italy; and others

The NA60 experiment collected data on dimuon production in indium-indium collisions at 158 GeV/c per incident nucleon, in year 2003, to contribute to the clarification of several questions raised by previous experiments studying high-energy heavy-ion physics at the CERN SPS in search of the quark gluon plasma. Among these previous results stands the observation, by NA50, that the production yield of J/{psi} mesons is suppressed in central Pb-Pb collisions beyond the normal nuclear absorption defined by proton-nucleus data. By comparing the centrality dependence of the suppression pattern between different colliding systems, S-U, Pb-Pb and In-In, we should be able to identify the corresponding scaling variable, and the physics mechanism driving the suppression. In this paper, we will present the ratio of J/{psi} and Drell-Yan production cross-sections in indium-indium collisions, in three centrality bins, and how these values compare to previous measurements. We will also present a study of the transverse momentum distributions of the J/{psi} mesons, in seven centrality bins.

• OSTI ID: 20787651
• Journal Information: AIP Conference Proceedings, Vol. 806, Issue 1; Conference: International workshop on quantum chromodynamics: Theory and experiment, Conversano, Bari (Italy), 16-20 Jun 2005; Other Information: DOI: 10.1063/1.2163775; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ABSORPTION
CERN SPS SYNCHROTRON
COMPARATIVE EVALUATIONS
CROSS SECTIONS
DISTRIBUTION
DRELL MODEL
GEV RANGE
INDIUM 115 TARGET
J PSI-3097 MESONS
LEAD 208 REACTIONS
LEAD 208 TARGET
NUCLEAR REACTION YIELD
PARTICLE PRODUCTION
QUARK MATTER
SULFUR 32 REACTIONS
TRANSVERSE MOMENTUM
URANIUM 238 TARGET