Negative-Pion Production in Relativistic Heavy-Ion Collisions

Negative-pion production in relativistic heavy-ion collisions has been studied in a triggered streamer-chamber experiment with projectile nuclei ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$ and ${}_{}{}^{40}{}_{}{}^{}\mathrm{Ar}$ in the energy range 0.4-2.1 GeV/nucleon incident on targets LiH, NaF, Ba${\mathrm{I}}_2$, and ${\mathrm{Pb}}_3$ ${\mathrm{O}}_4$. Negative-pion yields, multiplicity distributions, and angular and momentum distributions are reported.