First event-by-event fluctuation studies in Pb-Pb collisions at LHC energy by the ALICE experiment

TL;DR

This paper reports the first event-by-event fluctuation measurements of mean transverse momentum and net-charge in Pb-Pb collisions at LHC, providing insights into phase transition signatures in high-density matter.

Contribution

It presents the initial study of event-by-event fluctuations in Pb-Pb collisions at LHC energies using ALICE, focusing on mean transverse momentum and net-charge distributions.

Findings

Observation of significant fluctuations in mean transverse momentum.

Detection of net-charge distribution variations.

Evidence supporting phase transition signatures.

Abstract

The presence of the phase transition can manifest itself by the characteristic behavior of several observables which may vary dramatically from one event to the other. Thus, the study of various conserved quantities on an event-by-event basis offers the possibility to study the phase transition and the nature of high density matter. The ALICE experiment is well suited for precise event-by-event measurements of various quantities. In this article, the event-by-event fluctuations of mean transverse momentum and net-charge distributions as measured by the ALICE experiment are presented.