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Midrapidity Lambda and (Lambda)over-bar production in Au plus Au collisions at root s(NN)=130 GeV

Adler, C; Ahammed, Z; Allgower, C; Amonett, J; Anderson, BD; Anderson, M; Averichev, GS; ... STAR Collaboration, .; + view all (2002) Midrapidity Lambda and (Lambda)over-bar production in Au plus Au collisions at root s(NN)=130 GeV. PHYS REV LETT , 89 (9) , Article 092301. 10.1103/PhysRevLett.89.092301. Green open access

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Abstract

We report the first measurement of strange (Lambda) and antistrange ((&ULambda;) over bar) baryon production from s(NN)=130 GeV Au+Au collisions at the Relativistic Heavy Ion Collider (RHIC). Rapidity density and transverse mass distributions at midrapidity are presented as a function of centrality. The yield of Lambda and (&ULambda;) over bar hyperons is found to be approximately proportional to the number of negative hadrons. The production of (&ULambda;) over bar hyperons relative to negative hadrons increases very rapidly with transverse momentum. The magnitude of the increase cannot be described by existing hadronic string fragmentation models alone.

Type: Article
Title: Midrapidity Lambda and (Lambda)over-bar production in Au plus Au collisions at root s(NN)=130 GeV
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevLett.89.092301
Publisher version: http://dx.doi.org/10.1103/PhysRevLett.89.092301
Language: English
Keywords: HEAVY-ION COLLISIONS, QUARK-GLUON PLASMA, CHARGED-PARTICLE MULTIPLICITY, ENERGY NUCLEAR COLLISIONS, FREEZE-OUT, BARYON PRODUCTION, PB COLLISIONS, STRANGENESS, DEPENDENCE, EXPANSION
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
URI: https://discovery.ucl.ac.uk/id/eprint/1324841
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