Features of carbon-carbon interactions at a momentum of 4.2 GeV/c per nucleon that are accompanied by the production of {lambda} hyperons and K{sub S}{sup 0} mesons versus the degree of nuclei collision centrality

Journal Article · Thu Jun 15 00:00:00 EDT 2006 · Physics of Atomic Nuclei

DOI:https://doi.org/10.1134/S1063778806060068· OSTI ID:21076054

Baatar, B ^[1]; Galoyan, A S ^[2]; Kladnitskaya, E N ^[3]; Simic, Lj ^[4]; Uzhinsky, V V ^[5]

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1. Institute of Physics and Technology (Mongolia)
2. Yerevan Physics Institute (Armenia)
3. Joint Institute for Nuclear Research (Russian Federation)
4. Institute of Physics (Yugoslavia)
5. Joint Institute for Nuclear Research, Laboratory of Information Technologies (Russian Federation)

Experiemntal data obtained by using the 2-m propane bubble chamber of the Joint Institute for Nuclear Research (JINR, Dubna) are used to study the effect collision centrality on the spectra of {lambda} hyperons and K{sub S}{sup 0} mesons produced in carbon-carbon interactions at 4.2 A GeV/c. The multiplicity of participant protons having momenta in excess of 300 MeV/c is taken to be a measure of collision centrality. The features of pions and protons accompanying strange-particle production are also presented. The experimental data in question are compared with the prediction of a modified version of the FRITIOF model. It is shown that strange particles are predominantly produced in central and semicentral collisions. The average kinematical features of K{sub S}{sup 0} mesons are found to be indepedent of collision centrality. At the same time, the average transverse momentum of {lambda} hyperons and the average value of their emission angle increase slowly with increasing degree of collision centrality. The anisotropy of the angular distributions of both {lambda} hypersons and K{sub S/0} mesons in the c.m. frame of nucleon-nucleon collisions decreases with increasing collision centrality. The average transverse momentum of K{sub S}{sup 0} mesons is approximately 1.6 times higher than the average transverse momentum of {pi}{sup -} mesons.

• OSTI ID: 21076054
• Journal Information: Physics of Atomic Nuclei, Vol. 69, Issue 6; Other Information: DOI: 10.1134/S1063778806060068; Copyright (c) 2006 Nauka/Interperiodica; Article Copyright (c) 2006 Pleiades Publishing, Inc; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7788
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANGULAR DISTRIBUTION
ANISOTROPY
ATOM-ATOM COLLISIONS
BUBBLE CHAMBERS
CARBON
COLLISIONS
EMISSION
FORECASTING
HYPERONS
JINR
LAMBDA PARTICLES
MESONS
MULTIPLICITY
NUCLEI
NUCLEON-NUCLEON INTERACTIONS
PARTICLE PRODUCTION
PIONS MINUS
PROTONS
SPECTRA
STRANGE PARTICLES
TRANSVERSE MOMENTUM