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High pT suppression: particle dependence (II)
Rc p (ratio central/peripheral) at intermediate pT = 2 – 4 GeV/c:
- 1. Baryons: p, p, Λ, Λ NOT suppressed in central Au+Au.
- 2. Mesons: p0, k0s, η equally suppressed.
Particle composition inconsistent with known fragmentation functions.
Different production mechanism for baryons and mesons in the intermediate pT range (e.g. fragmentation vs. q recombination in dense partonic medium).