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arXiv · 1606.03250

HYDRO + JETS (HYDJET++) event generator for Pb+Pb collisions at LHC

L. Bravina·B. H. Brusheim Johansson·J. Crkovská·G. Eyyubova·V. Korotkikh·I. Lokhtin·L. Malinina·E. Nazarova·S. Petrushanko·A. Snigirev·E. Zabrodin
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Abstract

The Monte Carlo event generator HYDJET++ is one of the few generators, designed for the calculations of heavy-ion collisions at ultrarelativistic energies, which combine treatment of soft hydro-like processes with the description of jets traversing the hot and dense partonic medium. The model is employed to study the azimuthal anisotropy phenomena, dihadron angular correlations and event-by-event (EbyE) fluctuations of the anisotropic flow in Pb+Pb collisions at $\sqrt{s_{NN}} = 2.76$ TeV. The interplay of soft and hard processes describes the violation of the mass hierarchy of meson and baryon elliptic and triangular flows at p_T > 2 GeV/c, the fall-off of the flow harmonics at intermediate transverse momenta, and the worsening of the number-of-constituent-quark (NCQ) scaling of elliptic/triangular flow at LHC compared to RHIC energies. The cross-talk of v_2 and v_3 leads to emergence of higher order harmonics in the model and to appearance of the ridge structure in dihadron angular correlations in a broad pseudorapidity range. HYDJET++ possesses also the dynamical EbyE fluctuations of the anisotropic flow. The model results agree well with the experimental data.

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L. Bravina, B. H. Brusheim Johansson, J. Crkovská, G. Eyyubova, V. Korotkikh, I. Lokhtin, L. Malinina, E. Nazarova, S. Petrushanko, A. Snigirev, E. Zabrodin. 2016-06-10. HYDRO + JETS (HYDJET++) event generator for Pb+Pb collisions at LHC. https://doi.org/10.1088/1742-6596/736/1/012024

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