Identified pion interferometry in heavy-ion collisions at CERN

H. Bøggild, J. Boissevain, M. Cherney, J. Dodd, J. Downing, S. Esumi, C. W. Fabjan, A. Franz, K. H. Hansen, T. Humanic, T. Ikemoto, B. Jacak, H. Kalechofsky, T. Kobayashi, R. Kvatadze, Y. Y. Lee, M. Leltchouk, B. Lorstad, N. Maeda, Y. MiakeA. Miyabayashi, M. Murray, S. Nagamiya, S. Nishimura, S. U. Pandey, F. Piuz, V. Polychronakos, M. Potekhin, G. Poulard, D. Rahm, J. M. Rieubland, A. Sakaguchi, M. Sarabura, K. Shigaki, J. Simon-Gillo, W. Sondheim, T. Sugitate, J. Sullivan, Y. Sumi, H. Sletten, H. van Hecke, W. J. Willis

Research output: Contribution to journalArticlepeer-review

57 Scopus citations


π+π+ correlations from S + Pb collisions at 200 GeV/c per nucleon, measured by the focusing spectrometer of the NA44 experiment at CERN, are presented. The large data set, particularly at small values of Qinv, allows determination of the detailed shape of the correlation function. We construct the background by event mixing, and correct for resolution, Coulomb interaction, and distortion of single-particle spectra which produce effects large compared to the statistical errors at small Qinv. An exponential, rather than gaussian, source distribution is slightly favoured, but both are statistically acceptable.

Original languageEnglish (US)
Pages (from-to)510-516
Number of pages7
JournalPhysics Letters B
Issue number4
StatePublished - Apr 1 1993

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics


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