Event generator analysis for singly strange particle production data

Details Event generator analysis for singly strange particle production data Event generator analysis for singly strange particle production data

Apr 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997phrvc..55.2010b&link_type=abstract

Physical Review C (Nuclear Physics), Volume 55, Issue 4, April 1997, pp.2010-2015

Physics

Nuclear Physics

12

Particle And Resonance Production

Scientific paper

We have used the event generator LUCIAE to analyze the data of singly strange particle production in pp, pA, and AA reactions at 200A GeV and compared them with the corresponding experimental data and theoretical results of HIJING, VENUS, and RQMD. The results indicate that for reproducing the NA35 data of AA reactions it requires a somewhat larger s quark suppression factor (s=0.3) and shorter formation time (τ=1 fm/c) of produced particles than for reproducing the experimental data of pp and pA (s=0.2 and τ=1.5 fm/c). This might be understood intuitively from the relationship between the effective string tension and the violence of collision. However, the NA36 data of the negative multiplicity dependence of Λ in S + Pb reaction at 200 A GeV could not be well reproduced by LUCIAE, VENUS, or RQMD, and the NA36 data prefers model parameters of s=0.2 and τ=1.5 fm/c especially, this seems hard to understand and needs further studies. From comparing the NA35 data of the rapidity distribution of Λ in S + Ag reactions to the corresponding results of LUCIAE one knows that the effect of varying the s quark suppression factor from 0.2 to 0.3 is smaller than the effect of rescattering with respect to strangeness production.

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