Scaling properties of hyperon production in Au+Au collisons at {radical}{ovr s} {sub NN} = 200 GeV.

Journal Article · Mon Jan 01 04:00:00 EST 2007 · Phys. Rev. Lett.

DOI:https://doi.org/10.1103/PhysRevLett.98.062301· OSTI ID:965754

Cadman, R V; Krueger, K; Spinka, H M; McClain, C J; Underwood, D G; Adams, J; Aggarwal, M M; Ahammed, Z; Amonett, J; Anderson, M

We present the scaling properties of {Lambda}, {Xi}, and {Omega} in midrapidity Au+Au collisions at the Brookhaven National Laboratory Relativistic Heavy Ion Collider at {radical}s{sub NN} = 200 GeV. The yield of multistrange baryons per participant nucleon increases from peripheral to central collisions more rapidly than that of {Lambda}, indicating an increase of the strange-quark density of the matter produced. The strange phase-space occupancy factor {gamma}{sub s} approaches unity for the most central collisions. Moreover, the nuclear modification factors of p, {Lambda}, and {Xi} are consistent with each other for 2 < p{sub T} < 5 GeV/c in agreement with a scenario of hadron formation from constituent quark degrees of freedom.

• Research Organization: Argonne National Laboratory (ANL)
• Sponsoring Organization: SC; NSF
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 965754
• Report Number(s): ANL-HEP-PR-09-59
• Journal Information: Phys. Rev. Lett., Journal Name: Phys. Rev. Lett. Journal Issue: 2007 Vol. 98; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
74 ATOMIC AND MOLECULAR PHYSICS
BARYONS
BNL
DEGREES OF FREEDOM
HADRONS
HEAVY IONS
HYPERONS
MODIFICATIONS
NUCLEONS
PHASE SPACE
PRODUCTION
QUARKS