We study the effect of the strong quasi-classical gluon field produced in the pre-thermal equilibrium stage of ultra-relativistic heavy ion collisions (RHICs) on the evolution of heavy quarks. It is shown that this field leads to an initial enhancement of the nuclear modification factor (RAA) of charm quarks at large pT. After the further evolution in the QGP phase, we find a larger interaction strength, which is necessary to obtain the RAA measured in experiments, compared to the standard drag and diffusion dynamics without the inclusion of this pre-thermal equilibrium stage. Moreover, we find a larger final elliptic flow ν2 is obtained, that is quite close to the experimental measurements.
Impact of Glasma on heavy quark RAA and ν2 in nucleus-nucleus collisions at LHC
Sun Y.;Coci G.;Plumari S.;Ruggieri M.;Greco V.
2021-01-01
Abstract
We study the effect of the strong quasi-classical gluon field produced in the pre-thermal equilibrium stage of ultra-relativistic heavy ion collisions (RHICs) on the evolution of heavy quarks. It is shown that this field leads to an initial enhancement of the nuclear modification factor (RAA) of charm quarks at large pT. After the further evolution in the QGP phase, we find a larger interaction strength, which is necessary to obtain the RAA measured in experiments, compared to the standard drag and diffusion dynamics without the inclusion of this pre-thermal equilibrium stage. Moreover, we find a larger final elliptic flow ν2 is obtained, that is quite close to the experimental measurements.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
