Kinetic freeze-out temperature from yields of short-lived resonances

Abstract

A method to determine the kinetic freeze-out temperature in heavy-ion collisions from measured yields of short-lived resonances is presented. The resonance production is treated in the framework of thermal model with an evolution between chemical and kinetic freeze-outs. The yields of many short-lived resonances are suppressed at $T=T_{\mathrm{kin}}<T_{\mathrm{ch}}$. We determine the values of $T_{\mathrm{kin}}$ and $T_{\mathrm{ch}}$ for various centralities in Pb--Pb collisions at $\sqrt{s_{{}_{NN}}}=2.76$ TeV by fitting the abundances of both the stable hadrons and the short-lived resonances such as ${\rho }^0$ and ${\text{K}}^{\ast 0}$, that were measured by the ALICE collaboration. This allows to extract the kinetic freeze-out temperature from the measured hadron and resonance yields alone, independent of assumptions about the flow velocity profile and the freeze-out hypersurface. The extracted $T_{\mathrm{ch}}$ values exhibit a moderate multiplicity dependence whereas $T_{\mathrm{kin}}$ drops, from $T_{\mathrm{kin}}\simeq T_{\mathrm{ch}}\simeq 155$ MeV in peripheral collisions to $T_{\mathrm{kin}}\simeq 110$ MeV in 0-20% central collisions. Predictions for other short-lived resonances are presented. A potential (non-)observation of a suppressed $f_0(980)$ meson yield will allow to constrain the lifetime of that meson.

6 pages, 3 figures. Version published in Physical Review C

References in corpus (5)

• K*(892)${}^0$ and $\Phi$(1020) production in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• Repulsive baryonic interactions and lattice QCD observables at imaginary chemical potential
• Centrality dependence of hadronization and chemical freeze-out conditions in heavy ion collisions at \sqrt s_{NN} = 2.76 TeV
• Chemical freeze-out temperature in hydrodynamical description of Au+Au collisions at sqrt(s_NN) = 200 GeV
• Kinetic freeze-out in central heavy-ion collisions between 7.7 and 2760 GeV per nucleon pair

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