resonance suppression in collisions at energies available at the CERN Super Proton Synchrotron
Phys. Rev. C 113, 055202 – Published 1 May, 2026
DOI: https://doi.org/10.1103/6d1c-q3kc
Abstract
We investigate the production and suppression of short-lived resonances in and collisions at CERN-SPS energies (, 11.9, and 16.8 GeV) using the Ultrarelativistic Quantum Molecular dynamics (UrQMD) model. We present multiplicities, rapidity, and transverse momentum distributions, and analyze the yield ratios as a function of energy and centrality. We further estimate the time interval between chemical and kinetic freezeout 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.