Strange behavior of rapidity dependent strangeness enhancement of particles containing and not containing leading quarks

TL;DR

This study investigates how strangeness enhancement varies with rapidity in heavy-ion collisions at FAIR energies, revealing different behaviors for particles with leading versus produced quarks using the UrQMD model.

Contribution

It presents the first detailed analysis of rapidity-dependent strangeness enhancement for different particle types at FAIR energies using a string-based transport model.

Findings

Maximum strangeness enhancement at mid-rapidity for particles with leading quarks.

Different rapidity enhancement patterns for particles with only produced quarks.

Strangeness enhancement linked to net-baryon density distribution.

Abstract

Rapidity dependent strangeness enhancement factors for the identified particles have been studied with the help of a string based hadronic transport model UrQMD-3.3 (Ultra-relativistic Quantum Molecular Dynamics) at FAIR energies. A strong rapidity dependent strangeness enhancement could be observed with our generated data for $Au + Au$ collisions at the beam energy of 30\textit{A} GeV. The strangeness enhancement is found to be maximum at mid-rapidity for the particles containing leading quarks while for particles consisting of produced quarks only, the situation is seen to be otherwise. Such rapidity dependent strangeness enhancement could be traced back to the dependence of rapidity width on centrality or otherwise on the distribution of net-baryon density.