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φ production in Pb-Pb collisions at 158 GeV/c per nucleon incident momentum

  • B. Alessandro
  • , C. Alexa
  • , R. Arnaldi
  • , J. Astruc
  • , M. Atayan
  • , C. Baglin
  • , A. Baldit
  • , S. Beolè
  • , V. Boldea
  • , P. Bordalo
  • , G. Borges
  • , A. Bussière
  • , L. Capelli
  • , V. Caponi
  • , C. Castanier
  • , J. Castor
  • , B. Chaurand
  • , I. Chevrot
  • , B. Cheynis
  • , E. Chiavassa
  • C. Cicalò, T. Claudino, M. P. Comets, N. Constans, S. Constantinescu, P. Cortese, J. Cruz, A. De Falco, N. De Marco, G. Dellacasa, A. Devaux, S. Dita, O. Drapier, L. Ducroux, B. Espagnon, J. Fargeix, P. Force, M. Gallio, Y. K. Gavrilov, C. Gerschel, P. Giubellino, M. B. Golubeva, M. Gonin, A. A. Grigorian, S. Grigoryan, J. Y. Grossiord, F. F. Guber, A. Guichard, H. Gulkanyan, R. Hakobyan, M. Idzik, D. Jouan, T. L. Karavitcheva, L. Kluberg, A. B. Kurepin, Y. Le Bornec, C. Lourenço, P. Macciotta, M. Mac Cormick, A. Marzari-Chiesa, M. Masera, A. Masoni, M. Monteno, A. Musso, P. Petiau, A. Piccotti, J. R. Pizzi, W. Prado da Silva, F. Prino, G. Puddu, C. Quintans, L. Ramello, S. Ramos, P. Rato Mendes, L. Riccati, A. Romana, H. Santos, P. Saturnini, E. Scalas, E. Scomparin, S. Serci, R. Shahoyan, F. Sigaudo, S. Silva, M. Sitta, P. Sonderegger, X. Tarrago, N. S. Topilskaya, G. L. Usai, E. Vercellin, L. Villatte, N. Willis
  • University of Turin
  • IFA
  • Université Paris-Saclay
  • Yerevan Physics Institute
  • Laboratoire de Physique des Particules
  • Université Blaise Pascal
  • LIP - Lisboa
  • Instituto Superior Técnico
  • Centre national de la recherche scientifique
  • Universitá di Cagliari
  • Laboratory of Molecular Pathology
  • Institute for Nuclear Research of the Russian Academy of Sciences
  • Agh University of Science and Technology Faculty of Computer Science
  • European Organization for Nuclear Research
  • Rua São Francisco de Xavier

Research output: Contribution to journalArticlepeer-review

57 Citations (Scopus)

Abstract

The production of vector mesons φ, ρ and ω has been measured in Pb-Pb collisions at 158 GeV/c per nucleon incident momentum at the CERN/SPS. The muon spectrometer of experiment NA50 detects φ, ρ and ω mesons via their μ+μ- decay channel in the collision center of mass rapidity range 0 ≤ YCM ≤ 1. The results reported here show that the relative production of the φ compared to the (ρ + ω) and the φ multiplicity per participant nucleon (Npart) increase with the centrality of the collision. On the other hand, the (ρ + ω) multiplicity per participant does not exhibit any Npart dependence within our errors. The inverse slope parameter as deduced from an exponential fit to the π transverse mass distribution is 228 ± 10 MeV. Our results are compared with those obtained by experiment NA49 and with theoretical calculations.

Original languageEnglish
Pages (from-to)147-155
Number of pages9
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume555
Issue number3-4
DOIs
Publication statusPublished - 6 Feb 2003

Keywords

  • Phi, rho and Omega mesons
  • Quark-gluon plasma
  • Strangeness enhancement

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