Résumé
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.
| langue originale | Anglais |
|---|---|
| Pages (de - à) | 147-155 |
| Nombre de pages | 9 |
| journal | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |
| Volume | 555 |
| Numéro de publication | 3-4 |
| Les DOIs | |
| état | Publié - 6 févr. 2003 |
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