Probe the QCD phase diagram with phi-meson production in relativistic nuclear collisions at STAR

TL;DR

This paper investigates phi-meson production and elliptic flow in relativistic nuclear collisions at various energies to explore the QCD phase diagram and phase transition characteristics.

Contribution

It provides new measurements of phi-meson transverse momentum distribution and elliptic flow at multiple energies from STAR, analyzing their energy dependence and comparison with other hadrons.

Findings

Elliptic flow (v2) varies with collision energy.

Nuclear modification factors (R_CP) show energy dependence.

Comparison suggests insights into partonic-hadronic phase transition.

Abstract

We present phi-meson transverse momentum distribution as well as its elliptic flow (v_{2}) measurements in Au + Au collisions at center-of-mass energy per nucleon pair \sqrt{s_{NN}} = 7.7, 11.5 and 39 GeV with the data taken from STAR experiment at RHIC in the year 2010. We discuss the energy dependence of phi-meson elliptic flow (v_{2}) and central-to-peripheral nuclear modification factors (R_{CP}). The v_{2} of phi-mesons are compared to those from other hadron species. The implications on partonic-hadronic phase transition are discussed.