Speaker
Description
"The ALICE collaboration published the first measurement of the skewness and kurtosis of mean $p_T$ fluctuations, which can constrain the initial state of ultra-relativistic nuclear collisions.
In this paper, we investigate the higher-order mean $p_T$ fluctuations using a multiphase transport model for three different collision systems: pp collision at 5.02 TeV, Pb+Pb collision at 5.02 TeV and Xe+Xe collision at 5.44 TeV.
We find that the AMPT model provides a reasonable description of the standard skewness, intensive skewness and kurtosis as a function of system size for all three systems.
Moreover, AMPT model reproduces the non-monotonic trends of intensive skewness as observed in the experimental data.
In addition, we make predictions for the three observables in the forthcoming Pb+Pb collisions at 5.36 TeV.
We further examine the impacts of final-state interactions and the local scaling of the initial conditions and find that skewness is particularly sensitive to these effects in semi-central and central collisions.
In contrast, kurtosis shows little to no sensitivity."
