Abstract
The experimental transverse momentum distributions of negative pions produced in d 12C, 4He12C, and 12C12C collisions at 4.2 A GeV/c were analyzed in the framework of Hagedorn Thermodynamic Model. The spectral temperatures of π − mesons as well as their relative contributions to the total multiplicity of π − mesons were extracted from fitting the p t spectra by two-temperature Hagedorn function. The results were compared systematically with the earlier results obtained from analysis of non-invariant center-of-mass energy spectra of negative pions produced in the analyzed collisions.
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