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Enhanced strange baryon production in Au+Au collisions compared to p+p at root s(NN)=200 GeV

We report on the observed differences in production rates of strange and multi-strange baryons in Au+Au collisions at sqrts = 200 GeV compared to p+p interactions at the same energy. The yields in Au+Au collisions, when scaled by the number of participants, are larger than those measured in the p+p data. The magnitudes of the differences grow with the strangeness of the baryon and with increasing centrality. The enhancements of the Au+Au yields are close to those measured in sqrts = 17.3 GeV collisions. Further, when the binary scaled p+p pT spectra are compared to those of Au+Au the heavy-ion yields exceed binary scaling in the pT range 1 < pT< 4 GeV/c.

p p; colliding beams nucleus nucleus; colliding beams scattering; heavy ion gold hyperon; hadroproduction hyperon; hadronic decay hyperon; yield Lambda Xi- Omega- yield; enhancement impact parameter; dependence transverse momentum; spectra nuclear matter; effect magnetic detector; STAR experimental results Brookhaven RHIC Coll 200 GeV-cms/nucleon

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