Abstract.
We have measured the hadron-hadron correlation in the multiparticle production process of 16O-AgBr interactions at 60A GeV and 32S-AgBr interactions at 200A GeV in the forward and backward zone of the pseudo-rapidity space using the normalized factorial cumulant moment method. The experimental results have been compared with the Monte Carlo data generated according to the independent emission model. The results reveal that the observed correlation between the produced hadrons is purely dynamical. Correlation is found to be stronger in the backward zone than that in the forward zone of the pseudo-rapidity space for both interactions. Factorial cumulant moments for the experimental data show a power law rise with decreasing phase space bin size. The results obtained from the experimental data have also been compared with those obtained from analyzing FRITIOF data. Though FRITIOF data itself show the presence of a measured correlation among the hadrons, in most of the cases the values of the factorial cumulant moments are much less than the experimental values and they remain constant with phase space bin size. The study might hint towards the Bose-Einstein correlation as the origin of the observed behavior of the measured correlation. The failure of FRITIOF data to reproduce the exact experimental behavior in terms of factorial cumulant moment also supports this notion as the model does not take the BE correlation into account.
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Bhoumik, G., Bhattacharyya, S., Deb, A. et al. Measurements of charged hadron fluctuations in pseudo-rapidity bins in 16O-AgBr at 60 A GeV and 32S-AgBr at 200 A GeV. Eur. Phys. J. A 51, 78 (2015). https://doi.org/10.1140/epja/i2015-15078-y
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DOI: https://doi.org/10.1140/epja/i2015-15078-y