Speaker
Description
One of the key goals of nuclear collision experiments is to map the phase diagram of strongly interacting matter. At LHC energies there would be, for vanishing light quark masses, a temperature-driven genuine phase transition of second order between the hadron gas and the quark-gluon plasma. For realistic quark masses, however, this transition becomes a smooth cross over. Nevertheless, due to the small masses of current quarks one can still probe critical phenomena at the LHC energy, which can be confronted with the ab-initio LQCD calculations at vanishing baryon chemical potential. In this report recent results on event-by-event fluctuation measurements in Pb-Pb collisions at $\sqrt{s_{NN}}$ = 2.76 and 5.02 TeV will be presented. Together with the measured first four cumulants of net-protons in Pb-Pb collisions, differential studies on the second moments of net-charge distributions and their evolution from pp through p-Pb, Xe-Xe to Pb-Pb interactions will be highlighted. The obtained experimental results will be compared with the corresponding model calculations.
