In-Medium Modifications of Hadron Masses and Chemical Freeze-Out in Ultra-Relativistic Heavy-Ion Collisions

Abstract

We confront the hypothesis of chemical freeze-out in ultra-relativistic heavy-ion collisions with the hypothesis of large modifications of hadron masses in nuclear medium. We find that the thermal-model predictions for the ratios of particle multiplicities are sensitive to the values of in-medium hadronic masses. In particular, the ${\pi }^{+}/p$ ratio decreases by 35% when the masses of all hadrons (except for pseudo-Goldstone bosons) are scaled down by 30%.

5 pages, 1 figure

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Cited by in corpus (9)

• Thermal analysis of production of resonances in relativistic heavy-ion collisions
• Scaling of hadron masses and widths in thermal models for ultra-relativistic heavy-ion collisions
• Temperatures and chemical potentials at kinetic freeze-out in relativistic heavy ion collisions from coarse grained transport simulations
• Strange baryons in a hot and dense medium within the Nambu-Jona-Lasinio model
• Role of chemical potential at kinetic freeze-out using Tsallis non-extensive statistics in proton-proton collisions at the Large Hadron Collider
• Impact of Nucleon Mass Shift on the Freeze Out Process
• Dielectron Production in Heavy Ion Collisions at 158 GeV/c per Nucleon
• Pion Mass Shift and the Kinetic Freeze Out Process
• Influence of modified light-flavor hadron spectra on particle yields in the statistical hadronization model