Springer LINK: The European Physical Journal C - Abstract Volume 5 Issue 1 (1998) pp 63-75

The European Physical Journal C

ISSN: 1434-6044 (printed version)
ISSN: 1434-6052 (electronic version)

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Abstract Volume 5 Issue 1 (1998) pp 63-75
DOI 10.1007/s100529800892

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

The HELIOS/3 collaboration , A.L.S. Angelis et al. (2) (a)

(2) CERN, CH-1211 Geneva, Switzerland

Received: 27 October 1997 / Revised version: 5 March 1998 / Published online: 13 July 1998

Abstract. Results are presented on $\rho+\omega, \phi$ and $J/\Psi$ production in p-W and $^{32}$S-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 $B\sigma_\phi/\left (B\sigma_\rho + B\sigma_\omega\right )$, where $B$ is the relevant resonance $\mu\mu$ 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 $\phi$'s per charged particle. The ratio is measured in different intervals of p$_T$ and rapidity. It is not clearly dependent on p$_T$, but is larger at higher rapidities. $J/\Psi$ production, likewise normalized to charged multiplicity, is significantly lower in S-W compared to p-W interactions.

(a) also McGill University, Montreal,Canada

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The European Physical Journal C

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

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