Central Pb+Pb collisions at 158 A GeV/c studied by \pi^-\pi^- interferometry |
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Authors: | MM Aggarwal |
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Institution: | (1) University of Panjab, Chandigarh 160014, India , IN |
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Abstract: | Two-particle correlations have been measured for identified from central 158 A GeV Pb+Pb collisions and fitted radii of about 7 fm in all dimensions have been obtained. A multi-dimensional study of the
radii as a function of is presented, including a full correction for the resolution effects of the apparatus. The cross term of the standard fit in the Longitudinally CoMoving System (LCMS) and the parameter of the generalised Yano-Koonin fit are compatible with 0, suggesting that the source undergoes a boost invariant
expansion.
The shapes of the correlation functions in and have been analyzed in detail. They are not Gaussian but better represented by exponentials. As a consequence, fitting Gaussians
to these correlation functions may produce different radii depending on the acceptance of the experimental setup used for
the measurement.
Received: 3 February 2000 / Published online: 18 May 2000 |
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Keywords: | |
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