Transverse momentum and multiplicity fluctuations in the Be+Be energy scan from NA61/SHINE

TL;DR

This paper reports on measurements of transverse momentum and multiplicity fluctuations in Be+Be collisions, aiming to identify signs of the Critical Point in the QCD phase diagram through fluctuation analysis.

Contribution

It presents the first preliminary results of fluctuation measurements in Be+Be collisions from the NA61/SHINE experiment, comparing them with other systems and model predictions.

Findings

Fluctuation measurements are corrected for non-target interactions.

Be+Be fluctuation results are compared with p+p and Pb+Pb data.

Preliminary results show potential signals related to the Critical Point.

Abstract

The NA61/SHINE experiment aims to discover the Critical Point of strongly interacting matter and study the properties of the onset of deconfinement. These goals are to be achieved by per- forming a two-dimensional phase diagram ($T-\mu_{B}$) scan by measurements of hadron production properties in proton-proton, proton-nucleus and nucleus-nucleus interactions as a function of col- lision energy and system size. Close to the Critical Point an increase of fluctuations is predicted. This contribution presents preliminary results on transverse momentum and multiplicity fluctua- tions expressed in terms of strongly intensive quantities from the Be+Be energy scan. The data are fully corrected for contributions from non-target interactions. The Be+Be results are compared with NA61/SHINE measurements from the p+p energy scan, with NA49 results from central Pb+Pb collisions as well as with model predictions.