Jul 6 – 13, 2022
Bologna, Italy
Europe/Rome timezone

Higher-order event-by-event mean-$p_{\rm T}$ fluctuations in pp and A-A collisions with ALICE

Jul 8, 2022, 7:05 PM
1h 25m
Bologna, Italy

Bologna, Italy

Palazzo della Cultura e dei Congressi
Poster Heavy Ions Poster Session


Swati Saha


The study of event-by-event mean transverse momentum ($p_{\rm T}$) fluctuations is a useful tool to understand the dynamics of the system produced in ultrarelativistic heavy-ion collisions. The measurement of higher-order fluctuations of mean-$p_{\rm T}$ can help in probing the hydrodynamic behavior of the system and is considered to be a direct way of observing initial-state fluctuations. It can also be sensitive to the early-time evolution of the produced quark-gluon plasma. We present the first measurement of three- and four-particle $p_{\rm T}$ correlators and their intensive ratios, related to the skewness and kurtosis of event-by-event mean-$p_{\rm T}$ distribution, as a function of average charged-particle density in Pb-Pb collisions at $\sqrt{s_{\rm NN}}$ = 5.02 TeV and Xe-Xe collisions at $\sqrt{s_{\rm NN}}$ = 5.44 TeV using the data recorded by the ALICE detector. For the baseline study, the analysis is performed also in pp collisions at $\sqrt{s}$ = 5.02 TeV. The measurements are compared to corresponding results from the STAR experiment at lower collision energies and to different theoretical model predictions.

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