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Near-threshold [ital K][sup +] production in heavy-ion collisions

Journal Article · · Physical Review, C (Nuclear Physics); (United States)
 [1]
  1. Cyclotron Institute and Department of Physics, Texas A M University, College Station, Texas 77843 (United States)
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Within a hadronic transport model we study in detail contributions to kaon yields and momentum spectra from various baryon (resonance)-baryon (resonance) and [pi][ital N] interactions in heavy-ion collisions at beam energies near the free-space kaon production threshold. It is found that the finite lifetime of baryon resonances affects significantly the shape of kaon spectra, and the high energy parts of the kaon spectra are dominated by kaons from [pi][ital N][r arrow][Lambda][ital K][sup +] processes. [ital N][sup *](1440) resonances are found to contribute about 10% to the kaon yield. Effects of boosting the Fermi momentum distributions of the two colliding nuclei into their center-of-mass frame, centrality of the reaction, as well as the nuclear equation of state on kaon yields, and spectra are also discussed. Model calculations on the [ital K][sup +] spectra for the reaction of Au+Au at [ital E][sub beam]/[ital A]=1.0 GeV are compared with the experimental data from the KaoS Collaboration.
OSTI ID:
7004836
Journal Information:
Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 50:4; ISSN 0556-2813; ISSN PRVCAN
Country of Publication:
United States
Language:
English

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Related Subjects

662340 -- Hadron Interactions-- (1992-)
662410 -- Properties of Baryons & Baryon Resonances-- (1992-)
663450* -- Heavy-Ion-Induced Reactions & Scattering-- (1992-)
663580 -- Nuclear Mass Ranges-- A=190-219-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYON-BARYON INTERACTIONS
BOSONS
CHARGED-PARTICLE REACTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
GEV RANGE
GEV RANGE 100-1000
GOLD 197 REACTIONS
GOLD 197 TARGET
HADRON-HADRON INTERACTIONS
HADRONS
HEAVY ION REACTIONS
INTERACTIONS
KAONS
KAONS PLUS
MESON-BARYON INTERACTIONS
MESON-NUCLEON INTERACTIONS
MESONS
NUCLEAR REACTIONS
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PION-NUCLEON INTERACTIONS
PSEUDOSCALAR MESONS
RELATIVISTIC RANGE
STRANGE MESONS
STRANGE PARTICLES
TARGETS