Strange meson enhancement in PbPb collisions

I G Bearden,H Boggild, J G Boissevain,L Conin,Jeremy Dodd,B Erazmus, S Esumi, C Fabjan,D Ferenc,D E Fields,A Franz,J J Gaardhoje,A G Hansen,Ole Hansen,D Hardtke,H Van Hecke,E B Holzer,T J Humanic,P Hummel,B V Jacak, R Jayanti,K Kaimi,M Kaneta,T Kohama,M Kopytine,M Leltchouk,A Ljubicic,B Lorstad,Norihiko Maeda, Lawrence L Martin,A Medvedev,Michael Murray,H Ohnishi, G Paic,S U Pandey,F Piuz, J Pluta, V Polychronakos,M Potekhin,G Poulard,D Reichhold,A Sakaguchi, J Schmidtsorensen, J Simongillo,W E Sondheim, T Sugitate,J P Sullivan,Y Sumi,W Willis,K Wolf,N Xu,D Zachary

PHYSICS LETTERS B（1999）

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摘要

The NA44 Collaboration has measured yields and differential distributions of K+, K-, pi(+), pi(-) in transverse kinetic energy and rapidity, around the center-of-mass rapidity in 158 A GeV/c Pb + Pb collisions at the CERN SPS. A considerable enhancement of K+ production per pi is observed, as compared to p + p collisions at this energy. To illustrate the importance of secondary hadron rescattering as an enhancement mechanism, we compare strangeness production at the SPS and AGS with predictions of the transport model RQMD. (C) 1999 Published by Elsevier Science B.V. All rights reserved.

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关键词

relativistic heavy ion collisions,particle production,kaon,pion,strangeness enhancement,quark-gluon plasma

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