Charged pion production in 2 to 8 agev central au+au collisions

The E-0895 collaboration Klay, J.L. ; Ajitanand, N.N. ; Alexander, J.M. ; et al.
Phys.Rev. C68 (2003) 054905, 2003.
Inspire Record 622260 DOI 10.17182/hepdata.4989

Momentum spectra of charged pions over nearly full rapidity coverage from target to beam rapidity have been measured in the 0-5% most central Au+Au collisions in the beam energy range from 2 to 8 AGeV by the E895 Experiment. Using a thermal parameterization to fit the transverse mass spectra, rapidity density distributions are extracted. The observed spectra are compared with predictions from the RQMD v2.3 cascade model and also to a thermal model including longitudinal flow. The total 4$\pi$ yields of the charged pions are used to infer an initial state entropy produced in the collisions.

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