| Article | |
| Title | Event-by-Event correlations and fluctuations with strongly intensive quantities in heavy-ion and |
| Author(s) | Sputowska, Iwona Anna (Cracow, INP) |
| Collaboration | ALICE Collaboration |
| Publication | 2022 |
| Number of pages | 7 |
| In: | PoS CPOD2021 (2022) 027 |
| In: | International Conference on Critical Point and Onset of Deconfinement (CPOD 2021), Online, Germany, 15 - 19 Mar 2021, pp.027 |
| DOI | 10.22323/1.400.0027 |
| Subject category | Particle Physics - Experiment ; Nuclear Physics - Experiment |
| Accelerator/Facility, Experiment | CERN LHC ; ALICE |
| Abstract | This paper presents a short overview of event-by-event correlations and fluctuations analysis with strongly intensive quantities measured by ALICE at LHC in pp, p--Pb, Xe--Xe, and Pb--Pb collisions in the overall energy regime ranging from $\sqrt{s_{\rm NN}}=0.9$ up to 13 TeV. The evolution of the forward-backward strongly intensive quantity $\Sigma$ is analyzed as a function of the distance between forward and backward pseudorapidity intervals ($\eta$ gap), the centrality of the collision, and the width of the centrality bin. The observable is studied by means of different centrality estimators. The net-charge fluctuations with $\nu_{\rm dyn}[+,-]$, are examined as a function of charged-particle density (d$N_{\rm ch}$/d$\eta$). Our study demonstrates that $\Sigma$ indeed exhibits the properties of a strongly intensive quantity in terms of the independent source models, providing information on the early collision dynamics which is far more direct than that obtained from $b^{n-n}_{\rm corr}$. The measured negative values of $\nu_{\rm dyn}[+,-]$ indicate the dominance of the correlation between oppositely charged particles. A smooth evolution of net-charge fluctuations is observed from small to large collision systems. |
| Copyright/License | © 2022-2024 The author(s) (License: CC-BY-NC-ND-4.0) |
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Element opprettet 2023-05-25, sist endret 2023-06-06