Fluid dynamics of charm quarks in the quark-gluon plasma
Federica Capellino, A. Dubla, Stefan Floerchinger, Eduardo Grossi, Andreas Kirchner, S. Masciocchi
Abstract
A fluid-dynamic approach to charm-quark diffusion in the quark-gluon plasma (QGP) is developed for the first time. Results for integrated yields and momentum distributions of charmed hadrons obtained with a fluid-dynamic description for the dynamics of the QGP coupled to an additional heavy-quark-antiquark current are shown. In addition to the thermodynamic equation of state, this description uses a heavy-quark diffusion constant which we take from lattice QCD calculations. The results describe the experimental data measured at the LHC at the center-of-mass energy of $\sqrt{{s}_{\mathrm{NN}}}=5.02\text{ }\text{ }\mathrm{TeV}$ up to ${p}_{\mathrm{T}}\ensuremath{\sim}4--5\text{ }\text{ }\mathrm{GeV}/c$, showing that charm quarks undergo a very fast hydrodynamization in the medium created by ultrarelativistic heavy-ion collisions.