RAPIDITY AND ANGULAR DEPENDENCES OF SPECTRAL TEMPERATURES OF NEGATIVE PIONS PRODUCED IN 12C12C COLLISIONS AT 4.2A GeV/c

The average spectral temperatures of negative pions in (CC)-C-12-C-12 collisions at 4.2A GeV/c were extracted from transverse momentum as well as scaled center-of-mass kinetic energy distributions for different intervals of rapidity and emission angle of pi(-) in the center-of-mass system (cms) of (CC)-C-12-C-12 collisions. The temperatures extracted from experimental spectra of negative pions were compared systematically with the corresponding temperatures deduced from spectra of pi(-) calculated using Modified FRITIOF model. The dependence of the average spectral temperatures of negative pions on the rapidity and emission angle of pi(-) in the cms of (CC)-C-12-C-12 collisions at 4.2A GeV/c was analyzed.