Energy dependence of resonance production in relativistic heavy ion collisions

Abstract

The production of hadronic resonances K * 0 (892), φ(1020), Σ * (1385), and Ξ * (1530) in central AA collisions at √ s NN = 17.3, 200, and 2760 GeV are systematically studied. The direct production of these resonances at system hadronization are described by the quark combination model and the effects of hadron multiple-scattering stage are dealt with by a ultra-relativistic quantum molecular dynamics model (UrQMD). We study the contribution of these two production sources to final observation and compare the final spectra with the available experimental data. The p T spectra of K * 0 (892) calculated directly by quark combination model are explicitly higher than the data at low p T 1.5 GeV and taking into account the modification of rescattering effects the resulting final spectra well agree with the data at all three collision energies. The rescattering effect on φ(1020) production is weak and including it can slightly improve our description at low p T on the basis of overall agreement with the data. We also predict the p T spectra of Σ * (1385) and Ξ * (1530) to be tested by the future experimental data.