GLISSANDO 2: GLauber Initial-State Simulation AND mOre…, ver. 2

Rybczyński, M.; Stefanek, G.; Broniowski, Wojciech; Božek, Piotr

doi:10.1016/j.cpc.2014.02.016

Cited by 115 publications

(145 citation statements)

References 82 publications

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“…(1) The initial state is generated by GLISSANDO [30,31]. We use a mixed model of wounded nucleons and binary collisions with a weight coefficient α choosing its value of α = 0.24 because it successfully describes the experimentally observed correlation between multiplicity and centrality.…”

Section: Integrated Hydrokinetic Modelmentioning

confidence: 99%

Direct-photon spectrum and elliptic flow produced from Pb+Pb collisions at sNN=2.76 TeV at the CERN Large Hadron Collider within an integrated hydrokinetic model

2018

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The photon transverse momentum spectrum and its anisotropy from Pb+Pb collisions at the CERN Large Hadron Collider energy √ s NN = 2.76 TeV are investigated within the integrated hydrokinetic model (iHKM). Photon production is accumulated from the different processes at the various stages of relativistic heavy ion collisions: from the primary hard photons of very early stage of parton collisions to the thermal photons from equilibrated quark-gluon and hadron gas stages. Along the way a hadronic medium evolution is treated in two distinct, in a sense opposite, approaches: chemically equilibrated and chemically frozen system expansion. Studying the centrality dependence of the results obtained allows us to conclude that a relatively strong transverse momentum anisotropy of thermal radiation is suppressed by prompt photon emission which is an isotropic. We find out that this effect is getting stronger as centrality increases because of the simultaneous increase in the relative contribution of prompt photons in the soft part of the spectra. The substantial results obtained in iHKM with nonzero viscosity (η/s = 0.08) for photon spectra and v 2 coefficients are mostly within the error bars of experimental data, but there is some systematic underestimation of both observables for the near central events. We claim that a situation could be significantly improved if an additional photon radiation that accompanies the presence of a deconfined environment is included. Since a matter of a space-time layer where hadronization takes place is actively involved in anisotropic transverse flow, both positive contributions to the spectra and v 2 are considerable, albeit such an argument needs further research and elaboration.

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Section: Integrated Hydrokinetic Modelmentioning

confidence: 99%

Direct-photon spectrum and elliptic flow produced from Pb+Pb collisions at sNN=2.76 TeV at the CERN Large Hadron Collider within an integrated hydrokinetic model

2018

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“…IV and nucleus-nucleus collisions in Sec. V. We carry out numerical simulations with GLISSANDO [66,67], a flexible code for Monte Carlo Glauber [68] calculations. Since we wish to focus on situations where the initial fluctuations are most relevant, we only study central collisions, with exactly zero impact parameter (b = 0).…”

Section: Arxiv:14053274v2 [Nucl-th] 12 Sep 2014mentioning

confidence: 99%

Correlations in the Monte Carlo Glauber model

2014

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Event-by-event fluctuations of observables are often modeled using the Monte Carlo Glauber model, in which the energy is initially deposited in sources associated with wounded nucleons.In this paper, we analyze in detail the correlations between these sources in proton-nucleus and nucleus-nucleus collisions. There are correlations arising from nucleon-nucleon correlations within each nucleus, and correlations due to the collision mechanism, which we dub twin correlations. We investigate this new phenomenon in detail. At the RHIC and LHC energies, correlations are found to have modest effects on size and eccentricity fluctuations, such that the Glauber model produces to a good approximation a collection of independent sources.

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“…Much attention has now been paid to fluctuations of the anisotropic flows of final hadrons due to the fluctuations in the initial states of heavy-ion collisions, such as the fluctuations of nucleon positions and color charges inside colliding nuclei and multiplicities of initial parton production [10]. One of the most interesting consequences of initial-state fluctuations is the presence of elliptic flow in the most central nucleus-nucleus collisions, and finite odd harmonic flows in the final-state azimuthal distributions [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26]. The elliptic, triangular and other higher-order harmonic flows have been measured in Au+Au collisions at RHIC and Pb+Pb collisions at the LHC [27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Longitudinal decorrelation of anisotropic flows in heavy-ion collisions at the CERN Large Hadron Collider

et al. 2015

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Fluctuations in the initial transverse energy-density distribution lead to anisotropic flows as observed in central high-energy heavy-ion collisions. Studies of longitudinal fluctuations of the anisotropic flows can shed further lights on the initial conditions and dynamical evolution of the hot quark-gluon matter in these collisions. Correlations between anisotropic flows with varying pseudorapidity gaps in Pb+Pb collisions at the LHC are investigated using both an event-by-event (3+1)-D ideal hydrodynamical model with fluctuating initial conditions and the AMPT Monte Carlo model for high-energy heavy-ion collisions. Anisotropic flows at different pseudo-rapidities are found to become significantly decorrelated with increasing pseudo-rapidity gaps due to longitudinal fluctuations in the initial states of heavy-ion collisions. The longitudinal correlation of the elliptic flow shows a strong centrality dependence while the correlation of the triangular flow is independent of the centrality. Longitudinal fluctuations as a source of the decorrelation are further shown to consist of a twist or gradual rotation in flow angles between the forward and backward direction and additional fluctuations on top of the twist. Within the AMPT model, longitudinal correlations of anisotropic flows are also found to depend on the value of partonic cross sections. Implications on constraining the initial conditions and shear viscosity to entropy density ratio of the partonic matter in high-energy heavy-ion collisions are also discussed.

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GLISSANDO 2: GLauber Initial-State Simulation AND mOre…, ver. 2

Cited by 115 publications

References 82 publications

Direct-photon spectrum and elliptic flow produced from Pb+Pb collisions at sNN=2.76 TeV at the CERN Large Hadron Collider within an integrated hydrokinetic model

Direct-photon spectrum and elliptic flow produced from Pb+Pb collisions at sNN=2.76 TeV at the CERN Large Hadron Collider within an integrated hydrokinetic model

Correlations in the Monte Carlo Glauber model

Longitudinal decorrelation of anisotropic flows in heavy-ion collisions at the CERN Large Hadron Collider

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