First K*(892)^0 yields in central 40Ar+45Sc at √sNN=8.8–16.8 GeV give freeze-out time intervals of a few fm/c (lower limits) at the higher energies, similar to Pb+Pb.
$K^*(892)$ Resonance Suppression in Ar+Sc Collisions at SPS Energies
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We investigate the production and suppression of short-lived $K^*(892)$ resonances in p+p and Ar+Sc collisions at CERN-SPS energies ($\sqrt{s_{\mathrm{NN}}} = $ 8.8, 11.9, and 16.8~GeV) using the Ultra-relativistic Quantum Molecular Dynamics (UrQMD) model. We present multiplicities, rapidity and transverse momentum distributions, and analyze the $K^*/K$ yield ratios as a function of energy and centrality. We further estimate the time interval between chemical and kinetic freeze-out using the experimental method. A detailed comparison with recent NA61/SHINE data demonstrates that the UrQMD model captures the essential features of resonance dynamics, although the very strong resonance suppression in central collisions observed in the data cannot be quantitatively reproduced.
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$K^{*}(892)^0$ production and the time between freeze-outs in $^{40}$Ar+$^{45}$Sc collisions by NA61/SHINE at the CERN SPS
First K*(892)^0 yields in central 40Ar+45Sc at √sNN=8.8–16.8 GeV give freeze-out time intervals of a few fm/c (lower limits) at the higher energies, similar to Pb+Pb.