Transverse momentum distributions of [eta] mesons in near-threshold relativistic heavy ion reactions
Journal Article
·
· Physical Review Letters; (United States)
- II. Physikalisches Institut, D-35392 Universitaet Giessen (Germany) Kernfysisch Versneller Institut, NL-9747 AA Groningen (Netherlands) Gesellschaft fuer Schwerionenforschung, D-64220 Darmstadt (Germany)
Transverse momentum spectra of [eta] mesons have been measured near the free nucleon-nucleon production threshold in the heavy ion reactions [sup 40]Ar+ [sup nat]Ca, [sup 86]Kr + [sup nat]Zr, and [sup 197]Au+ [sup 197]Au at 1.0[ital A] GeV and also in [sup 40]Ar+ [sup nat]Ca at 1.5[ital A] GeV. The measured transverse momentum distributions are compared to model calculations. The relative abundance of [Delta](1232) and [ital N](1535) resonances excited in the collision is deduced. A comparison to pion data reveals scaling with the transverse mass of the emitted meson.
- OSTI ID:
- 5212880
- Journal Information:
- Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 72:7; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
663450* -- Heavy-Ion-Induced Reactions & Scattering-- (1992-)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALINE EARTH METALS
ARGON 40 REACTIONS
BARYONS
BOSONS
CALCIUM
CHARGED-PARTICLE REACTIONS
DELTA BARYONS
DELTA-1232 BARYONS
DISTRIBUTION FUNCTIONS
ELEMENTARY PARTICLES
ELEMENTS
ETA MESONS
FERMIONS
FUNCTIONS
GOLD 197 REACTIONS
GOLD 197 TARGET
HADRONS
HEAVY ION REACTIONS
KRYPTON 86 REACTIONS
LINEAR MOMENTUM
MESONS
METALS
N BARYONS
N-1535 BARYONS
NUCLEAR REACTIONS
PSEUDOSCALAR MESONS
SPECTRA
TARGETS
TRANSITION ELEMENTS
TRANSVERSE MOMENTUM
ZIRCONIUM
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALINE EARTH METALS
ARGON 40 REACTIONS
BARYONS
BOSONS
CALCIUM
CHARGED-PARTICLE REACTIONS
DELTA BARYONS
DELTA-1232 BARYONS
DISTRIBUTION FUNCTIONS
ELEMENTARY PARTICLES
ELEMENTS
ETA MESONS
FERMIONS
FUNCTIONS
GOLD 197 REACTIONS
GOLD 197 TARGET
HADRONS
HEAVY ION REACTIONS
KRYPTON 86 REACTIONS
LINEAR MOMENTUM
MESONS
METALS
N BARYONS
N-1535 BARYONS
NUCLEAR REACTIONS
PSEUDOSCALAR MESONS
SPECTRA
TARGETS
TRANSITION ELEMENTS
TRANSVERSE MOMENTUM
ZIRCONIUM