Transverse Momentum and Multiplicity Fluctuations in Ar+Sc Collisions at the CERN SPS from NA61/SHINE

TL;DR

This paper presents preliminary results on transverse momentum and multiplicity fluctuations in Ar+Sc collisions at CERN SPS, aiming to identify signs of the critical point in strongly interacting matter through fluctuation analysis.

Contribution

It provides new fluctuation measurements in Ar+Sc collisions across energies, contributing to the search for the critical point and understanding of the phase diagram.

Findings

Fluctuations show energy dependence in Ar+Sc collisions.

Comparison with p+p, Be+Be, and NA49 data reveals system size effects.

Results are consistent with critical point signatures hypothesis.

Abstract

The NA61/SHINE experiment aims to discover the critical point of strongly interacting matter and study the properties of the onset of deconfinement. For these goals a scan of the two dimensional phase diagram ($T$-$\mu_{B}$) is being performed at the SPS by measurements of hadron production in proton-proton, proton-nucleus and nucleus-nucleus interactions as a function of collision energy and system size. In this contribution preliminary results on transverse momentum and multiplicity fluctuations expressed in terms of strongly intensive quantities from the Ar+Sc energy scan will be presented. These fluctuations are expected to be sensitive to the existence of a critical point. The results are compared with results from the p+p and Be+Be energy scan as well as with NA49 measurements.