The dimuon mass spectrum produced in p-U collisions is well described, for masses below 1.5 GeV, as a superposition of light meson decays (the hadronic cocktail), the decays of charmed mesons and quark-antiquark annihilation into muon pairs. When these results are extrapolated to sulphur induced collisions, a small excess is observed over the whole mass region, particularly pronounced in the phi peak.
NA38/NA50 results on the low mass dimuon spectra
DE FALCO, ALESSANDRO
1998-01-01
Abstract
The dimuon mass spectrum produced in p-U collisions is well described, for masses below 1.5 GeV, as a superposition of light meson decays (the hadronic cocktail), the decays of charmed mesons and quark-antiquark annihilation into muon pairs. When these results are extrapolated to sulphur induced collisions, a small excess is observed over the whole mass region, particularly pronounced in the phi peak.
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