Hadronic resonances in heavy-ion collisions at ALICE

14th International Conference on Strangeness in Quark Matter

Knospe, A.G.^1

Department of Physics, University of Texas at Austin, 1 University Station C1600, Austin, TX 78712-0264, United States^1

关键词: Chiral symmetry;    Collision systems;    Freeze out;    Freeze out temperature;    Heavy ion collision;    High energy heavy-ion collision;    Pb-Pb collisions;    Scattering effects;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/509/1/012087/pdf
DOI  :  10.1088/1742-6596/509/1/012087

来源: IOP

【 摘 要 】

Properties of the hadronic phase of high-energy heavy-ion collisions can be studied by measuring the ratios of hadronic resonance yields to the yields of longer-lived particles. These ratios can be used to study the strength of re-scattering effects, the chemical freeze-out temperature, and the lifetime between chemical and kinetic freeze-out. The restoration of chiral symmetry during the early hadronic phase or near the phase transition may lead to shifts in the masses and increases in the widths of hadronic resonances. The ALICE collaboration has measured the spectra, masses, and widths of the K*(892)0and φ(1020) resonances in Pb-Pb collisions at 2.76 TeV. These results, including RAAand the ratios of the integrated resonance yields to stable hadron yields, are presented and compared to results from other collision systems and to theoretical predictions.