Speaker
Description
Oxygen–Oxygen collisions have recently opened a new avenue for studying the system-size dependence of QCD matter in relativistic nuclear collisions. Positioned between small systems such as pp and pA and large heavy-ion systems such as AuAu and PbPb, OO collisions provide a unique opportunity to investigate how collective phenomena and medium effects evolve with the size and density of the produced system. Recent measurements from RHIC and the LHC indicate that OO collisions exhibit many features previously associated with heavy-ion collisions, including collective flow, multiparticle correlations, and characteristic patterns of identified-particle production, while offering new constraints on the onset of medium-induced effects. This talk presents a brief overview of recent OO results from RHIC and LHC, covering particle production, soft QCD dynamics of small system (azimuthal anisotropy, multiparticle correlations), heavy-flavor and quarkonium observables, strangeness and baryon-to-meson production, and hard probes sensitive to parton energy loss. The status of ongoing analyses and future measurements will also be discussed, emphasizing the emerging role of OO collisions in understanding the limits and properties of strongly interacting QCD matter.
