May 13 – 19, 2018
Venice, Italy
Europe/Zurich timezone
The organisers warmly thank all participants for such a lively QM2018! See you in China in 2019!

Latest predictions from the EbyE NLO EKRT model

May 16, 2018, 6:10 PM
Sala Mosaici-1, 3rd Floor (Palazzo del Casinò)

Sala Mosaici-1, 3rd Floor

Palazzo del Casinò

Parallel Talk Collective dynamics Collective dynamics


Harri Niemi (J. W. Goethe Universität)


We present the latest results from the event-by-event NLO pQCD + saturation + viscous hydrodynamics (EbyE NLO EKRT) model [1,2,3,4]. The parameters in the EKRT saturation model are fixed by the charged hadron multiplicity in the 0-5 \% 2.76 TeV Pb+Pb collisions, and the $\sqrt{s}$, A and centrality dependence of the initial particle production is determined by the QCD dynamics of the model. The initial state is then evolved using viscous hydrodynamics, and the $\sqrt{s}$ and A dependence of low-$p_T$ hadron spectra is computed.

Our results are in an excellent agreement with the low-$p_T$ data from 2.76 and 5.02 TeV Pb+Pb collisions at the LHC and 200 GeV Au+Au collisions at RHIC [1,2]. In particular, we study the centrality dependence of hadronic multiplicities, pT spectra, flow coefficients, probability distributions of relative elliptic flow fluctuations, and various flow correlations. A simultaneous analysis of these observables at several collision energies puts much more stringent constraints on the temperature dependence of the shear viscosity than e.g. the flow coefficients at the LHC energies alone.

We present our latest results for various correlators, like symmetric cumulants and non-linear flow coefficients, together with their $p_T$ dependence for all the above collision systems [3]. Furthermore, we show our predictions for the centrality dependence of charged hadron multiplicity and flow coefficients in the 5.44 TeV Xe+Xe collisions at the LHC [4].

[1] H. Niemi, K. J. Eskola and R. Paatelainen, Phys. Rev. C93 (2016) 2, 024907, arXiv:1505.02677 [hep-ph].

[2] H. Niemi, K. J. Eskola, R. Paatelainen and K. Tuominen, Phys. Rev. C93 (2016) 1, 014912, arXiv:1511.04296 [hep-ph].

[3] H. Niemi, K. J. Eskola and R. Paatelainen, work in progress.

[4] K. J. Eskola, H. Niemi, R. Paatelainen and K. Tuominen, arXiv:1711.09803 [hep-ph].

Content type Theory
Centralised submission by Collaboration Presenter name already specified

Primary authors

Kari J. Eskola (University of Jyvaskyla) Harri Niemi (J. W. Goethe Universität) Risto Paatelainen (University of Santiago de Compostela) Kimmo Tuominen (University of Helsinki)

Presentation materials