Recent STAR Measurements from the RHIC Beam Energy Scan II

Abstract

We present selected recent results from the second phase of the Beam Energy Scan program (BES-II) at RHIC, based on high-statistics data collected by the STAR experiment in collider and fixed-target modes, covering $\sqrt{s_{NN}}=3.0$--$27$~GeV. New results from isobar (Ru+Ru, Zr+Zr) collisions at $\sqrt{s_{NN}}=200$~GeV are also presented. The presented results span bulk properties and strangeness production, femtoscopy, collectivity and hyperon polarization, and fluctuation observables sensitive to the QCD phase structure. Future prospects with newly recorded fixed-target datasets are also briefly outlined.

Proceedings of SQM 2026 conference