Energy dependence of resonance production in relativistic heavy ion collisions

Abstract

The production of hadronic resonances $K^{\ast }(892)$, $\varphi (1020)$, ${\Sigma }^{\ast }(1385)$, and ${\Xi }^{\ast }(1530)$ in central AA collisions at $\sqrt{s_{NN}}=$ 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 $K^{\ast }(892)$ calculated directly by quark combination model are explicitly higher than the data at low $p_T\lesssim 1.5$ 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 $\varphi (1020)$ 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 ${\Sigma }^{\ast }(1385)$ and ${\Xi }^{\ast }(1530)$ to be tested by the future experimental data.

arXiv comment5 pages, 6figures

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