Recent ALICE results from light-ion collision systems

TL;DR

This paper reports recent ALICE measurements in light-ion collisions at the LHC, including particle densities, flow coefficients, and pion suppression, providing insights into particle production and collective effects in small systems.

Contribution

It presents new experimental data on light-ion collisions and compares them with theoretical models to enhance understanding of small-system phenomena.

Findings

Charged-particle pseudorapidity density measurements in pO, OO, and Ne--Ne collisions.

Observation of neutral pion yield suppression in OO collisions.

Comparison of data with models to study collective phenomena and energy loss.

Abstract

This article presents recent measurements by the ALICE Collaboration in proton--oxygen (pO), oxygen--oxygen (OO), and neon--neon (Ne--Ne) collisions delivered by the LHC in July 2025. Measurements of the primary charged-particle pseudorapidity density and the elliptic and triangular flow coefficients of charged particles are reported. Experimental evidence of the suppression of neutral pion yields in OO collisions relative to the proton--proton baseline is also discussed. Comparisons of these new data with theoretical models provide key input to understand particle production, collective phenomena, and parton energy loss in small collision systems.