Charged pion production in $\mathbf{Au+Au}$ collisions at $\mathbf{\sqrt{s_{NN}}}$ = 2.4$\mathbf{GeV}$

Understand

We present high-statistic data on charged pion emission from Au+Au collisions at $\sqrt{s_{\rm{NN}}}$ = 2.4 GeV (corresponding to $E_{beam}$ = 1.23 A GeV) in four centrality classes in the range 0 - 40$\%$ of the most central collisions.

• The data are analyzed as a function of transverse momentum, transverse mass, rapidity, and polar angle.
• Pion multiplicity per participating nucleon decreases moderately with increasing centrality.
• The polar angular distributions are found to be non-isotropic even for the most central event class.