Femtoscopy at NA61/SHINE using symmetric Lévy sources in central ${}^{40}$Ar+${}^{45}$Sc from 40$A$ GeV/$c$ to 150$A$ GeV/$c$

Abstract

In the recent decades of high energy physics research, it was demonstrated that strongly interacting quark-gluon plasma (sQGP) is created in ultra-relativistic nucleus-nucleus collisions. Investigation and understanding of properties of the hadronic matter is among the important goals of NA61/SHINE collaboration at CERN SPS. Mapping of the phase diagram is achieved by varying the collision energy (5 GeV $<\sqrt{s_{\text{NN}}}<$17 GeV) and by changing the collision system (p+p, p+Pb, Be+Be, Ar+Sc, Xe+La, Pb+Pb). We report on the measurement of femtoscopic correlations in intermediate system at intermediate SPS energies. Interpreting the results of measurements within the symmetric Lévy source formalism, we discuss the values of Lévy source parameters as a function of average pair transverse mass. One of the physical parameters is particularly important, the Lévy exponent $\alpha$, which describes the shape of the source and may be related to the critical exponent $\eta$ in the proximity of the critical point. Therefore, measuring it may shed light on the location of the critical endpoint of the QCD phase diagram.

11 pages, 7 figures, proceedings of the 23rd Zimanyi School Winter Workshop on Heavy Ion Physics, Budapest, Hungary, December 4 - 8, 2023, published in the International Journal of Modern Physics A, special issue "Zimanyi School 2023"

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Cited by in corpus (2)

• Lévy walk of pions in heavy-ion collisions
• Investigating the excitation function of HBT radii for Lévy-stable sources