# STAR Results from Au + Au Fixed-Target Collisions at sqrt(s_NN) = 4.5 GeV

## TL;DR

This paper reports on STAR's first fixed-target collision results at 4.5 GeV, demonstrating successful event reconstruction and particle identification, and compares flow, spectra, and HBT radii with previous experiments.

## Contribution

It provides new fixed-target collision data at 4.5 GeV and validates STAR's capabilities in this configuration, informing future fixed-target experiments.

## Key findings

- Directed flow of protons and lambdas measured
- Elliptic flow of identified hadrons analyzed
- HBT radii and spectra compared with AGS results

## Abstract

We present results from STAR's first dedicated fixed-target run conducted in 2015 with Au + Au collisions at sqrt(s_NN) = 4.5 GeV. Directed flow of protons and lambdas, elliptic flow of identified hadrons, HBT radii, as well as pion, K^0_s, and Lambda spectra are compared with previous results from the AGS. These results demonstrate that STAR has good event reconstruction and particle identification capabilities in the fixed-target configuration. The implications of these results on future STAR fixed-target runs are discussed.