Studying the Production of Identified Charged Hadrons in the PHENIX Experiment

The authors present recent PHENIX measurements of the production of identified charged hadrons ( $${{\pi }^{ \pm }}$$ , $${{K}^{ \pm }}$$ , $$p$$ , $$\bar {p}$$ ) in $$p$$ + Al, 3He + Au, and Cu + Au collisions at $$\sqrt {{{s}_{{NN}}}} $$ = 200 GeV and in U + U collisions at $$\sqrt {{{s}_{{NN}}}} $$ = 193 GeV. The measured ratios of $$p{\text{/}}~{{\pi }^{ + }}$$ and $$\bar {p}{\text{/}}{{\pi }^{ - }}$$ yields are compared to predictions made with the AMPT (string melting version) and PYTHIA/ANGANTYR program packages. Integral ratios of $$p{\text{/}}~{{\pi }^{ + }}$$ , $$\bar {p}{\text{/}}{{\pi }^{ - }}$$ , $${{K}^{ + }}{\text{/}}{{\pi }^{ + }}$$ , $${{K}^{ - }}{\text{/}}{{\pi }^{ - }}$$ yields are presented as functions of the number of nucleons participating in nucleus–nucleus interactions.