Blast Wave Fits to Elliptic Flow Data at $\sqrt{s_{\mathrm{NN}}}=$ 7.7--2760 GeV

Abstract

We present blast wave fits to elliptic flow ($v_2(p_{\mathrm{T}})$) data in minimum bias collisions from the $\sqrt{s_{\mathrm{NN}}}=$ 7.7--200 GeV at RHIC, and 2.76 TeV at LHC. The fits are performed separately for particles and corresponding anti-particles. The mean transverse velocity parameter ${\hat{I}}^2$ shows an energy dependent difference between particles and corresponding anti-particles, which increases as the beam energy decreases. Possible effects of feed down, baryon stopping, anti-particle absorption, and early production times for anti-particles are discussed.

7 pages, 4 figures