PHENIX Highlights

TL;DR

The PHENIX experiment studies various observables in different collision systems at RHIC to understand cold nuclear matter effects, hot quark-gluon plasma, and parton-medium interactions, providing new insights into high-energy nuclear physics.

Contribution

This paper presents new measurements from PHENIX, including particle flow, quarkonium production, and parton-medium interactions in diverse collision systems and energies.

Findings

Quantified initial state effects in cold nuclear matter.

First results on particle flow and quarkonium in U+U and Cu+Au collisions.

Investigated parton-medium interactions using high pT hadrons and gamma-hadron correlations.

Abstract

PHENIX reports on electromagnetic and hadronic observables in large data sets of p+p, d+Au and Au+Au collisions at various cms energies. Initial state effects in cold nuclear matter are quantified by centrality dependent $\pi^0$, $\eta$, reconstructed jets and $\psi\prime$ measurements. Using the first run of the new EBIS ion source at RHIC, we report first results for particle flow ($v_1$ and $v_2$) and quarkonium production in U+U and Cu+Au collisions. Hot matter created in Au+Au is characterized using event-plane dependent HBT and dielectrons. Parton-medium interactions are investigated using high $p_T$ single hadrons, $\gamma$-hadron correlations and heavy flavor decay electrons identified with the newly installed VTX detector.