2024/11/06 by Feyisola I. Nana, Nana, Feyisola, Martín, Jordi Salinas San +2
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Nuclear Theory (nucl-th) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions
paper · pdf · doi:10.48550/arxiv.2411.03705
openalex publication_date 2024/11/06 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The statistical hadronization model has been successful in extracting information at chemical freeze-out in heavy-ion collisions. At RHIC, with a collision energy of √sNN=200 GeV, many different ion species have been used for A+A collisions. This allows for a scan across the charge fraction YQ=Z/A, where Z is the proton number and A is the baryon number. We first make predictions for A+A collisions that do not yet have published experimental data on hadron yield ratios (O+O, Ru+Ru, Zr+Zr). We then use both the experimental and predicted yield ratios to perform thermal fits across YQ, enabling us to extract s/nB and other thermodynamic information at chemical freeze-out. Using the relation between s/nB and YQ, we can calculate a new constraint on the finite temperature equation of state at finite densities. We discuss implications of this constraint and propose future runs that can help connect to the equation of state relevant for neutron star mergers.