Quark Matter 2025

Measurements of Λ-Λ Correlation Function in Au+Au Collisions at sNN = 3 GeV

Not scheduled

20m

Goethe University Frankfurt, Campus Westend, Theodor-W.-Adorno-Platz 1, 60629 Frankfurt am Main, Germany

Poster Collective dynamics & small systems Poster session 2

Speaker

ke mi

Description

Femtoscopy is a powerful technique for probing both the emission source and the interaction potential between particle pairs. The key observable in femtoscopy is the two-particle correlation function, which provides crucial insights into the space-time dynamics of the emitting source as well as final-state interaction effects. Among the less explored interactions is the hyperon-hyperon (YY) interaction, which remains poorly understood both theoretically and experimentally. Understanding the YY interaction is vital not only for advancing our knowledge of the equation of state in neutron star interiors but also for the search for exotic hadrons, which could offer deeper insights into the strong force and nuclear matter under extreme conditions.

In this poster, the first measurements of $\mathrm{\Lambda }$-$\mathrm{\Lambda }$ correlation function in Au+Au collisions at $\sqrt{s_{NN}}$ = 3 GeV with the fixed-target mode from STAR Beam Energy Scan II will be presented. Using the Lednicky-Lyuboshitz model, the physics parameters including source size, scattering length and effective range will be extracted. The results will be compared with the data from higher energies along with model calculations generated via the UrQMD hadronic transport model and HALQCD potentials.

Presentation materials

QM2025_poster_kmi_submit_final_size.pdf