Study of vector mesons in dimuon production in a large kinematic region in p-W and S-W interactions at 200 GeV/c/nucleon

A. L.S. Angelis*, J. Antos, M. Beaulieu, H. Beker, G. Briskin, J. Bystricky, M. G. Catanesi, P. Cerello, S. Dagan, G. Dellacasa, M. Diehl, S. Di Liberto, B. Dolgoshein, M. Esten, C. W. Fabjan, A. Gaidot, M. Gallio, P. Giubellino, U. Goerlach, C. GuerraL. A. Hamel, S. Konovalov, I. Kralik, G. London, F. Martelli, J. P. Martin, M. Masera, M. A. Mazzoni, F. Meddi, M. T. Muciaccia, S. Muraviev, A. Nomerotsky, Y. Oren, J. P. Pansart, G. Poulard, L. Ramello, L. Riccati, G. Rosa, L. Sandor, M. Sarris, E. Scomparin, A. Shmeleva, S. Simone, S. Smirnov, P. Taras, J. Urban, E. Vercellin

*Corresponding author for this work

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Abstract

Results are presented on ρ + ω, (latin small letter o with stroke) and J/Ψ production in p-W and 32S-W interactions at 200 GeV/c/nucleon measured via the dimuon decay in a large kinematic region. The data are normalized to the charged particle multiplicity in the same rapidity interval. They have been collected using the HELIOS/3 muon spectrometer at the CERN SPS. The ratio Bσ(latin small letter o with stroke)/ (Bσρ, + Bσω), where B is the relevant resonance μμ branching fraction, increases between proton and sulphur projectiles, and is somewhat enhanced going from peripheral to central S-W interactions. This results from an increase in the number of produced (latin small letter o with stroke)'s per charged particle. The ratio is measured in different intervals of pΤ and rapidity. It is not clearly dependent on pΤ, but is larger at higher rapidities. J/Ψ production, likewise normalized to charged multiplicity, is significantly lower in S-W compared to p-W interactions.

Original languageEnglish
Pages (from-to)63-75
Number of pages13
JournalEuropean Physical Journal C
Volume5
Issue number1
DOIs
StatePublished - 1998

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