Orateur
Fernando G Gardim
(Federal University of Alfenas - BRA)
Description
We show that, within the hydrodynamic framework of heavy-ion collisions, the mean transverse momentum of charged hadrons ($\langle p_t \rangle $) rises as a function of the multiplicity in ultra-central nucleus-nucleus collisions. The relative increase is proportional to the speed of sound squared ($c_s^2$) of the
quark-gluon plasma, that is therefore accessible experimentally using ultra-central data. Based on the value of $c_s^2$ calculated in lattice QCD, we predict that $\langle p_t \rangle $ increases by $\approx$ 18 MeV between 1$\%$ and 0.001$\%$ centrality in Pb+Pb collisions at $\sqrt{s_{NN}}$ = 5.02 TeV.
Auteurs principaux
Fernando G Gardim
(Federal University of Alfenas - BRA)
Dr
Jean-Yves Ollitrault
(Saclay)
Mlle
Giuliano Giacalone
(SACLAY)
