Particle spectra and correlations from Experiment 814

Conference · Mon Aug 01 04:00:00 EDT 1994

OSTI ID:10169959

Stachel, J

In this article the authors summarize recent results from the E814 forward spectrometer on proton and pion distributions that give insight into the initial baryon (and energy) density achieved in central collisions as well as the temperature of the system at freeze-out. An independent measure for the latter, complementing the slope constants of particle spectra, is the population of nucleon excited states, in particular the {Delta}(1232) resonance. Besides its influence on the pion spectra it has also been identified directly in the experiment and first results are discussed. The first results from E814 on kaon spectra at low transverse momentum p{sub t} are presented; the spectra show an unexpected very steep rise at the lowest p{sub t}. The two pion correlation function has been studied for positive and negative pions and the authors show that it is consistent with a large source size at freeze-out. Finally, they show that the present data give a consistent picture of a system in thermal and chemical equilibrium at freeze-out.

• Research Organization: State Univ. of New York, Stony Brook, NY (United States). Dept. of Physics
• Sponsoring Organization: USDOE, Washington, DC (United States); National Science Foundation, Washington, DC (United States); Natural Sciences and Engineering Research Council of Canada, Ottawa, ON (Canada)
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 10169959
• Report Number(s): BNL--49934; CONF-930636--15; ON: DE94015731
• Country of Publication: United States
• Language: English

Related Subjects

663450
663530
663560
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
A = 20-38
A = 90-149
ALUMINIUM 27 TARGET
ANGULAR DISTRIBUTION
HEAVY-ION-INDUCED REACTIONS AND SCATTERING
LEAD
PARTICLE PRODUCTION
PIONS
PROTONS
SILICON 28 REACTIONS