E sub T distributions, nuclear stopping'', and correlations among measurements from the 4 detector systems in AGS E802
As part of AGS Experiment 802, an array of 245 Lead Glass blocks, covering half the azimuth, with a polar angular acceptance approximately 8{degree} {le} {theta} {le} 32{degree}, which corresponds roughly to a laboratory pseudo rapidity range 1.25 {le} {eta} {le} 2.50 with good acceptance, when edges and corners are taken into account, measured the transverse energy (E{sub T}) distributions from primary beams of protons, {sup 16}O, and {sup 28}Si, at 14.6 A Gev/c, incident on targets of Be, Al, Cu and Au. The lead glass is most sensitive to electromagnetic radiation, but also responds to charged hadrons. The total detector response provides a good measure of the global pion yield in the central rapidity region of these reactions. Correlations among the 4 detector systems in E802 are shown to be a powerful diagnostic tool. Latest results of the analysis in progress, including dE{sub T}/d{eta} distributions, are presented, with emphasis on the proton -- nucleus data. Additionally, these data, and previous measurements of pseudorapidity distributions of multiplicity and Transverse Energy at both the AGS and CERN are analyzed in an acceptance-independent and model-independent method, with the conclusion that simple considerations of nuclear geometry do not provide an explanation of the different {radical}{sup s}NN dependences observed in {sup 16}O + Au and p-p reactions. 37 refs., 25 figs.
- Research Organization:
- Brookhaven National Lab., Upton, NY (USA)
- Sponsoring Organization:
- DOE/ER
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 6828240
- Report Number(s):
- BNL-44683; CONF-900331-9; ON: DE90012637; TRN: 90-018924
- Resource Relation:
- Conference: Workshop on heavy ion physics at the alternating gradient synchrotron, Upton, NY (USA), 3-7 Mar 1990
- Country of Publication:
- United States
- Language:
- English
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72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ALUMINIUM
HEAVY ION REACTIONS
BERYLLIUM
COPPER
GOLD
BROOKHAVEN AGS
CORRELATIONS
ENERGY DEPENDENCE
FIREBALL MODEL
GLASS SCINTILLATORS
MAGNETIC SPECTROMETERS
PARTICLE RAPIDITY
PROTON-PROTON INTERACTIONS
SHOWER COUNTERS
STOPPING POWER
TRANSVERSE ENERGY
ACCELERATORS
ALKALINE EARTH METALS
BARYON-BARYON INTERACTIONS
CHARGED-PARTICLE REACTIONS
CYCLIC ACCELERATORS
ELEMENTS
ENERGY
HADRON-HADRON INTERACTIONS
INTERACTIONS
KINETIC ENERGY
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
METALS
NUCLEAR REACTIONS
NUCLEON-NUCLEON INTERACTIONS
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PROPERTIES
PHOSPHORS
PROTON-NUCLEON INTERACTIONS
RADIATION DETECTORS
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TRANSITION ELEMENTS
651000* - Nuclear Physics
645100 - High Energy Physics- Particle Interactions & Properties-Experimental