Density and expansion effects on pion spectra in relativistic heavy-ion collisions

Abstract

We compute the pion inclusive momentum distribution in heavy-ion collisions at AGS energies, assuming thermal equilibrium and accounting for density and expansion effects at the time of decoupling. We compare to data on mid rapidity charged pions produced in central Au + Au collisions and find a very good agreement. The shape of the distribution at low $m_t-m$ is explained in part as an effect arising from the high mean pion density achieved in these reactions. The difference between the positive and negative pion distributions in the same region is attributed in part to the different average yields of each kind of charged pions.

Minor changes, typo in Fig. 2b corrected, version to appear in Phys. Rev. C

References in corpus (3)

• Coulomb Effects on Charged Kaon Distributions From Vlasov Dynamics
• Density and Boundary Effects on Pion Distributions in Relativistic Heavy--Ion Collisions
• Size of Fireballs Created in High Energy Lead-Lead Collisions as Inferred from Coulomb Distortions of Pion Spectra

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