Directed flow of Identified Charged Particles from the RHIC Beam Energy Scan

TL;DR

This paper reports measurements of directed flow for various identified charged particles in gold-gold collisions at different energies, providing insights into the collision dynamics and comparing results with transport model predictions.

Contribution

It provides new experimental data on directed flow of identified particles at multiple energies, enhancing understanding of the collision evolution.

Findings

Directed flow varies with energy, transverse momentum, rapidity, and centrality.

Results show differences between particle species and model predictions.

Data constrains theoretical models of heavy-ion collision dynamics.

Abstract

We present the STAR measurements of directed flow, v1, for {\pi}{\pm}, K{\pm}, protons and antiprotons, as well as for all detected charged particles in Au + Au collisions at {\surd}sNN = 7.7, 11.5 and 39 GeV as a function of transverse momentum, rapidity and centrality. Results are compared to the predictions from transport models.