Abstract
The proposed relativistic hadronic cascade model has been used to analyse two-pion Bose-Einstein correlation in central collision of Si + Au at AGS energy. Theπ−π− correlation function calculated according to the space-time and four momentum distributions ofπ− at freeze-out agrees quite well with that of E802 experimental onse. We also have calculated the root mean squared length of theπ− source above and compared it with the conventional fitted radius ofπ− source. It is mentioned that due to the non-Gaussian features in position and momentum distributions of the source and the dependence of the location upon the momentum especially, to regard the conventional fitted radius as the spatial extent of the source is dangerous. Instead, it might be more reliable to predict the spatial extent of the source with the root mean squared length.
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