EPS HEP 2015

22-29 July 2015
Europe/Vienna timezone

Triangular flow in relativistic heavy-ion collisions within HYDJET++

24 Jul 2015, 11:50
20m
HS30 ()

HS30

talk Heavy Ion Physics

Speaker

Jana Crkovska (FNSPE CTU Prague)

Description

The hadronic collective flow was found to be one of the most pronounced signatures of the Quark-Gluon Plasma (QGP), the hot and dense matter created in the collisions of relativistic heavy ions. The azimuthal distribution of detected hadrons can be expanded into a Fourier series over the azimuthal angle, the flow harmonics are then represented by the Fourier coefficients. In semi-peripheral and peripheral collisions, the anisotropic flow is dominated by elliptic flow, defined by the second Fourier coefficient $v_2$. On the other hand, the contribution of the third component $v_3$ becomes more pronounced in central collisions due to the spatial initial state fluctuations. Study of the triangular flow, $v_3$ in Pb+Pb collisions at $\sqrt{s_{NN}} = 2.76$ TeV and in Au+Au collisions at $\sqrt{s_{NN}} = 200$ GeV was performed using HYDJET++ Monte Carlo model. HYDJET++ combines a parametrised hydrodynamics for soft physics with a microscopic jet quenching generator for hard and semi-hard scattering, giving a realistic prediction of the shape of distribution for different hadron species. The model also enables study of influence of final-state interactions on flow of created hadrons. The interplay between soft and hard processes, as well as the influence of the resonance decays on the triangular flow in AA collisions at RHIC and LHC were studied. Reasons for violation of number-of-constituent-quark scaling at LHC for triangular and elliptic flow will be also discussed.

Primary author

Jana Crkovska (FNSPE CTU Prague)

Co-authors

Evgeny Zabrodin (University of Oslo (NO)) Larisa Bravina (University of Oslo (NO))