Conveners
Parallel session 21: Correlations & fluctuations II
- Bedangadas Mohanty (National Institute of Science Education and Research (NISER) (IN))
Radial flow and anisotropic flow are key observables used to study the expansion dynamics of the quark-gluon plasma (QGP). While anisotropic flow has been extensively explored, the collective nature of radial flow has remained less understood. This talk presents the first measurement of transverse momentum ($p_{\mathrm{T}}$) dependence of radial flow fluctuations, $v_0(p_{\mathrm{T}})$, over...
The interactions between Λ hyperons and nucleons are of crucial importance for understanding the composition of the inner core of neutron stars. The equation of state for these dense objects requires accurate knowledge of two- and three-body interactions at short distances, which remain poorly constrained by existing experimental data. ALICE has introduced a novel approach for probing these...
Studies of strong interactions between hadrons provide a valuable opportunity to test Quantum Chromodynamics at nucleon-scale distances. The femtoscopy technique has proven to be an effective tool for studying interactions between unstable hadrons by measuring the correlation function of hadron pairs in momentum space. This approach offers insights into the interaction between two hadrons,...
We report on the analysis of event-by-event (E-by-E) fluctuations of protons and light nuclei, in heavy-ion collisions (Au+Au at $\sqrt{s_{NN}}$ = 2.4 GeV and Ag+Ag at $\sqrt{s_{NN}}$ = 2.55 GeV) measured with the HADES (High-Acceptance Di-Electron Spectrometer) apparatus. The results of various analysis techniques, including cut-based [1], fuzzy logic [2], and machine learning [3], will be...
The observation of long-range correlations is a crucial indicator of collectivity in heavy-ion collisions and has been instrumental in establishing the formation of quark-gluon plasma (QGP) at RHIC and LHC. In this study, the first direct measurement of radial flow is presented using a new observable, $ v_{\rm 0}(p_{\rm T}) $, formulated to capture the long-range correlations in the transverse...
We study the effect of magnetic field on particle ratios and charge fluctuations in hadron resonance gas. We argue that the big change in the pion to proton ratio is due to ill-defined description of higher-spin states, and that because of detailed balance, neutral resonances must be affected by the field too. The calculated fluctuations of conserved charges are likewise suspicious and must be...
The D-measure of the event-by-event net charge fluctuations was introduced over 20 years ago as a potential signal of quark-gluon plasma (QGP) in heavy-ion collisions, based on the fractional charges of quarks leading to suppression of fluctuations relative to hadron gas baseline. Measurements have been performed at RHIC and LHC, but in the absence of quantitative calculations for both...
