Probing QGP-like Collectivity in Oxygen–Oxygen Collisions at SNN=7 TeV Using the Color String Percolation Model

We study the thermodynamic and transport properties of QCD matter produced in oxygen–oxygen (OO) collisions at [Formula: see text] TeV within the Color String Percolation Model (CSPM), using simulated events from the A Multi–Phase Transport (AMPT) model. Three nuclear density configurations—Woods–Saxon, harmonic oscillator, and [Formula: see text]clustered profiles—are considered to examine the role of initial-state geometry. The percolation density parameter [Formula: see text] is extracted from transverse momentum spectra and used to determine the temperature, energy density, and transport coefficients. We observe a universal scaling of [Formula: see text] with transverse particle density, connecting OO collisions smoothly with proton–proton and heavy-ion systems. At high multiplicities, the temperature exceeds the universal hadronization threshold and the shear viscosity approaches the Kovtun–Son–Starinets bound, indicating nearly perfect fluid behavior. These results demonstrate that percolation-driven collectivity and deconfinement can emerge in light-ion collisions, establishing OO interactions as a bridge between small and large systems at the LHC.