XI International Conference on New Frontiers in Physics

Higher-order event-by-event mean-pT fluctuations in pp and A--A collisions with ALICE

12 Sept 2022, 16:20

20m

Room 1

Talk Heavy Ion Collisions and Critical Phenomena

Speaker

Swati Saha (National Institute of Science Education and Research (NISER) (IN))

Description

The study of event-by-event mean transverse momentum ($p_{\mathrm{T}}$) 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-$p_{\mathrm{T}}$ 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 $p_{\mathrm{T}}$ correlators and their intensive ratios, related to the skewness and kurtosis of event-by-event mean-$p_{\mathrm{T}}$ distribution, as a function of average charged-particle density in Pb--Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV and Xe--Xe collisions at $\sqrt{s_{\mathrm{NN}}}$ = 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.

Details

Swati Saha
Institute: National Institute of Science Education and Research, India
[https://www.niser.ac.in/]

Presentation materials

ICNFP_Presentation_2022_v5_extendedsession.pdf