# ICHEP2018 SEOUL

Jul 4 – 11, 2018
COEX, SEOUL
Asia/Seoul timezone

## HYDJET++ model for the ultra-relativistic heavy-ion collisions: new results and developments

Jul 6, 2018, 5:06 PM
18m
105 (COEX, Seoul)

### 105

#### COEX, Seoul

Parallel Heavy Ions

### Speaker

Serguei Petrushanko (M.V. Lomonosov Moscow State University (RU))

### Description

HYDJET++ model combines the description of soft processes with the treatment of hard partons propagating medium. The model is employed for the analysis of PbPb collisions at LHC energies, particularly, the azimuthal anisotropy phenomena, flow, femtoscopy, hard probes. The influence of geometric and dynamical anisotropies on the development of flow harmonics and, simultaneously, on the second- and third-order oscillations of femtoscopy radii were studied. The interplay of soft hydro-like processes and jets is able to describe the violation of the mass hierarchy of meson and baryon elliptic and triangular flows at transverse momentum $p_T > 2$ GeV/c, the fall-off of the anisotropic 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 elliptic and triangular flows leads to emergence of higher order harmonics in the model and to appearance of ridge structure in dihadron angular correlations in a broad pseudorapidity range. Recently, the model was further extended to describe quantitatively the event-by-event fluctuations of the anisotropic flow. The model calculations agree well with the experimental data.

### Primary authors

Serguei Petrushanko (M.V. Lomonosov Moscow State University (RU)) Larisa Bravina (University of Oslo (NO)) Gyulnara Eyyubova (M.V. Lomonosov Moscow State University (RU)) Vladimir Korotkikh (M.V. Lomonosov Moscow State University (RU)) Igor Lokhtin (M.V. Lomonosov Moscow State University (RU)) Ludmila Malinina (SINP MSU) Ms Elizaveta Nazarova (M.V. Lomonosov Moscow State University (RU)) Alexandre Snigirev (M.V. Lomonosov Moscow State University (RU)) Evgeny Zabrodin (University of Oslo (NO))