Measurements of Ks, Lambda and Xi from Au+Au collisions at \sqrt{s_NN} = 7.7, 11.5 and 39 GeV in STAR

TL;DR

This paper presents measurements of strange hadron spectra (Ks, Lambda, Xi) at mid-rapidity in central Au+Au collisions at three energies, comparing results with other experiments and statistical models to understand particle production.

Contribution

It provides new experimental data on strange hadron production at intermediate energies and compares these with models and other collision systems.

Findings

Yields are consistent with Pb+Pb data from SPS.

Particle ratios agree with statistical hadronization model predictions.

Results support thermalization of strange particles at these energies.

Abstract

We report on the measurements of Ks, Lambda and Xi spectra at mid-rapidity (|y|<0.5) in the most central (0-5%) Au+Au collisions at \sqrt{s_NN} = 7.7, 11.5 and 39 GeV from the STAR experiment. The extracted yields and the corresponding data from Pb+Pb collisions measured by the NA49 and CERES experiments at SPS are consistent. The Lambda, Anti-Lambda, Xi- and Xi+ to pion ratios agree well with the predictions from a statistical hadronization model at all three energies.