Source Density Distribution and Intensity Interferometry in High-energy Heavy-ion Collisions

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Liu Yiming, Huo Lei, Jiang Yuzhen, Wang Shan, D. Keane, S. Y. Fung and S. Y. Chu. Source Density Distribution and Intensity Interferometry in High-energy Heavy-ion Collisions[J]. Chinese Physics C, 1991, 15(S1): 33-41.
Liu Yiming, Huo Lei, Jiang Yuzhen, Wang Shan, D. Keane, S. Y. Fung and S. Y. Chu. Source Density Distribution and Intensity Interferometry in High-energy Heavy-ion Collisions[J]. Chinese Physics C, 1991, 15(S1): 33-41. shu
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Received: 1990-08-28
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    Supported by the National Natural Science Foundation of China and United States Funding Agencies.

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Source Density Distribution and Intensity Interferometry in High-energy Heavy-ion Collisions

  • 1 Department of Physics, Harbin Institute of Technology, Harbin, Heilongjiang, China;
  • 2 Department of Physics, Kent State University, Kent, Ohio, USA;
  • 3 Departmcnt of Physics, University of California, Riverside, California, USA
Fund Project:  Supported by the National Natural Science Foundation of China and United States Funding Agencies.

Abstract: The fitted spatial parameter from intensity interferometry is related to an average radius <r> of the particle-emitting source. The mean-square radius〈r2〉of the source can be estimated by the small relative momentum correlation function. More detailed information about the source density distribution can be inferred from the value of k=<r2>/<r>2. A study of central collisions of 1.8 A GeV Ar + Pb at the Bevalac streamer chamber shows that the data are consistent with an a priori Gaussian model for the density distribution at the present level of experimental accuracy. The average radius of the pion source in the reaction is deduced, and a possible picture to describe the expanding pion source is presented.

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