Understanding the K⁎/K ratio in heavy ion collisions
C. Le Roux, F. S. Navarra, Luciano M. Abreu
Abstract
We study the K⁎ meson dissociation in heavy ion collisions during the hadron gas phase. We use the production and absorption cross sections of the K⁎ and K mesons in a hadron gas, which were calculated in a previous work. We compute the time evolution of the K⁎ abundance and the K⁎/K ratio during the hadron gas phase. Assuming a Bjorken type cooling and using an empirical relation between the freeze-out temperature and the central multiplicity density, we are able to write K⁎/K as a function of (dN/dη(η=0)). The obtained function is in very good agreement with recent experimental data.
Topics & Concepts
Heavy ionHadronMultiplicity (mathematics)MesonPhysicsDissociation (chemistry)Nuclear physicsIonAtomic physicsChemistryPhysical chemistryMathematicsQuantum mechanicsMathematical analysisHigh-Energy Particle Collisions ResearchQuantum Chromodynamics and Particle InteractionsParticle physics theoretical and experimental studies