Abstract:The experimental rapidity distributions of negative pions were studied in minimum bias d + 12 C, 12 C + 12 C, and 12 C + 181 Ta collisions at 4.2 GeV/c per nucleon with 4π acceptance. The quantitative analysis of centrality dependence of the rapidity as well as transverse momentum versus rapidity spectra of the negative pions in the above collisions was performed by fitting the pion spectra with a Gaussian function. The widths of the rapidity spectra of π − mesons decreased in going from peripheral to central … Show more
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