Abstract
The transverse momentum distributions of final-state particles produced in nucleus-nucleus (AA), proton-nucleus (pA), and proton-proton (pp) collisions at high energies are investigated using a multisource ideal gas model. Our calculated results show that the contribution of hard emission can be neglected in the study of transverse momentum spectra of charged pions and kaons produced in Cu-Cu collisions at =22.5 GeV. And if we consider the contribution of hard emission, the transverse momentum spectra of p and p̄ produced in Cu-Cu collisions at =22.5 GeV, K0s produced in Pb-Pb collisions at 158 A GeV, J/ψ particles produced in p-Pb collisions at 400 GeV and π+, K+, p produced in proton-proton collisions at = 200 GeV, can be described by the model, especially in the tail part of spectra.
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