pi. /sup 0/ spectra and correlations from /sub 16/O + Au collisions at 200 A GeV

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The production of neutral pions by the interaction of 200 A GeV proton and /sup 16/O projectiles with an Au target has been studied for 1.5 /<=/ /eta/ /<=/ 2.1. Transverse momentum spectra have been measured between 0.4 GeV/c and 2.8 GeV/c and their dependence on the centrality of the reaction has been investigated. The peripheral spectrum shows a marked change of slope with a hard component starting at about 1.8 GeV/c in close similarity to p + p data. Preliminary analyses of photon data yield an excess over known photon sources for central data which is absent for peripheral ... continued below

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Pages: 16

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Gutbrod, H.H.; Albrecht, R.; Awes, T.C.; Baktash, C.; Beckmann, P.; Berger, F. et al. January 1, 1988.

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Description

The production of neutral pions by the interaction of 200 A GeV proton and /sup 16/O projectiles with an Au target has been studied for 1.5 /<=/ /eta/ /<=/ 2.1. Transverse momentum spectra have been measured between 0.4 GeV/c and 2.8 GeV/c and their dependence on the centrality of the reaction has been investigated. The peripheral spectrum shows a marked change of slope with a hard component starting at about 1.8 GeV/c in close similarity to p + p data. Preliminary analyses of photon data yield an excess over known photon sources for central data which is absent for peripheral reactions. Correlations of 4 photons representing neutral pions have been studied in ultrarelativistic heavy ion collisions. Data were taken in the WA80 experiment at the CERN-SPS with a 200 A GeV oxygen beam. The ..pi../sup 0/ are detected via their decay photons with a high-granularity lead glass array. Special features of interferometry using neutral pions will be discussed. The extracted preliminary parameters for high p/sub T/ pions emitted near midrapidity in O + Au collisions lead to rather small effective source sizes. 23 refs., 8 figs.

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Pages: 16

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NTIS, PC A03/MF A01 - OSTI; 1.

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  • Conference on hadronic matter in collision, Tucson, AZ, USA, 6 Oct 1988

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  • Other: DE89006421
  • Report No.: CONF-8810264-4
  • Grant Number: AC05-84OR21400
  • Office of Scientific & Technical Information Report Number: 6388546
  • Archival Resource Key: ark:/67531/metadc1208525

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  • January 1, 1988

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  • July 5, 2018, 11:11 p.m.

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  • Oct. 17, 2018, 12:46 p.m.

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Gutbrod, H.H.; Albrecht, R.; Awes, T.C.; Baktash, C.; Beckmann, P.; Berger, F. et al. pi. /sup 0/ spectra and correlations from /sub 16/O + Au collisions at 200 A GeV, article, January 1, 1988; United States. (digital.library.unt.edu/ark:/67531/metadc1208525/: accessed December 14, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.