Muon pair and vector meson cross-sections in p W and S U collisions at 200-GeV/nucleon

The NA38 collaboration Abreu, M.C. ; Baglin, C. ; Baldisseri, A. ; et al.
Phys.Lett.B 368 (1996) 230-238, 1996.
Inspire Record 428066 DOI 10.17182/hepdata.28422

Muon pair production is studied in p - W and S  U collisions at 200 GeV per nucleon, as a function of transverse momentum P Tμμ . The inclusive ϱ + ω and Φ differential cross-sections dσ dP T are measured in the dimuon decay channel, for P T ≥ 0.6 GeV/c, in the central rapidity region, 3.0≤ y ≤ 4.0. Assuming the power law A-dependence σ = σ 0 ( A beam · A target ) α , the study of the integrated cross-sections for p - W and S  U collisions leads to α ϱ + ω = 1.00±0.02±0.07 and α Φ = 1.23±0.03±0.05, showing clear evidence of Φ enhancement in S  U interactions as compared to p - W collisions.

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