Radial and elliptic flow at RHIC: further predictions

Abstract

Using a hydrodynamic model, we predict the transverse momentum dependence of the spectra and the elliptic flow for different hadrons in Au+Au collisions at sqrt(s) = 130 A GeV. The dependence of the differential and p_t-integrated elliptic flow on the hadron mass, equation of state and freeze-out temperature is studied both numerically and analytically.

Figures (7)

• Figure 1: The $p_t$ spectra of neutral pions (upper left), negative hadrons (upper right), and protons (lower left) for the 6$\%$ most central Au+Au collisions at $\sqrt{s}=130\,A$ GeV, for different equations of state and freeze-out temperatures (see text). The crosses show UrQMD results for neutral pions and protons at $\sqrt{s}=200\,A$ GeV Bleicher99 for comparison. Also shown are the corresponding hydrodynamic spectra at $\sqrt{s}=17\,A$ GeV for EOS Q(120) (thin solid lines).
• Figure 2: The $m_t$-spectra of negative pions (upper left), kaons (upper right), protons (lower left) and $\Omega$ baryons (lower right) for Au+Au collisions at $\sqrt{s}=130\,A$ GeV, for collision centralities (top to bottom) $b < 5.4$, $5.4 < b < 9.9$ and $9.9 < b < 13.5$ fm. For clarity the spectra for different centrality bins are separated by factors of 10. The calculations were done with EOS Q. The $\Omega$ distribution is also shown for $T_f = 164$ MeV to simulate decoupling at the phase transition.
• Figure 3: $p_t$-differential elliptic flow at midrapidity for va-ri-ous hadrons from minimum bias Au+Au collisions at $\sqrt{s}=$$130\,A$ GeV for EOS Q(120).
• Figure 4: The effect of the EOS and the freeze-out temperature on the elliptic flow of midrapidity pions (left) and protons (right) from minimum bias Au+Au collisions at $\sqrt{s}=130\,A$ GeV.
• Figure 5: The $p_t$-differential elliptic flow of negative hadrons (upper left), pions (upper right), protons (lower left) and omega baryons (lower right) for Au+Au collisions at $\sqrt{s}=130\,A$ GeV for collision centralities (top to bottom) $9.9 < b < 13.5$, $5.4 < b < 9.9$ and $b < 5.4$ fm. The calculations were done for EOS Q.