Two-particle small-angle correlations between negative pions and between protons in carbon-carbon collisions atP=4.2 GeV/c per nucleon have been studied, both for an unbiased sample and for “central” events. A comparison of experimental π− π− andpp correlation functions with theoretical predictions has been made. A possible evidence for the existence of two fireballs in C+C interactions atP=4.2 GeV/c per nucleon is presented.
THE SECOND REACTION IS TAKEN TO BE 'CENTRAL'.
THE SECOND REACTION IS TAKEN TO BE 'CENTRAL' AND P OF PROTONS < 0.3 GEV FOR BOTH REACTIONS.
THE SECOND REACTION IS TAKEN TO BE 'CENTRAL' AND E(P=3-4,RF=LAB) < 0.3 GEV ,(P(P=3-4,RF=LAB))**2 < 0.2 GEV**2 FOR ALL REACTIONS.
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292+-7 MUB - CORRECTED VALUE FOR FIRST REACTION (SLOW PROTONS). M(P 4PI) <= 3.5 GEV FOR REACTIONS WITH FOUR PIONS.
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In a large-acceptance spectrometer, muon pairs and associated hadrons were observed with μμ masses up to 10 GeV/ c 2 and ΔM M = 0.015 resolution. We report here on the production of 4000 J/ ψ and 80 ψ ′ mesons.
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