Constraints on rapidity-dependent initial conditions from charged-particle pseudorapidity densities and two-particle correlations

Ke, Weiyao; Moreland, J. Scott; Bernhard, Jonah E.; Bass, Steffen A.

doi:10.1103/physrevc.96.044912

Cited by 50 publications

(46 citation statements)

References 94 publications

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“…Our result suggests that a suitable η/s can be chosen between η/s = 0.08 and η/s = 0.17, which does not contradict the results of Ref. [55].…”

Section: B Constant Shear Viscosity With Vanishing Bulk Viscositysupporting

confidence: 74%

“…For an initial condition of our hydrodynamic model, we use T R ENTo [54,55]. In the parametric model T R ENTo, the initial entropy density s(x, η s ) is given by a function on the transverse plane at midrapidity f (x) and a rapidity-dependent function g(x, η s );…”

Section: Modelmentioning

confidence: 99%

“…w i is random weight for introduction of a negative binomial distribution of produced particles and ω is Gaussian nucleon width. A parameter p in the function f (x) can interpolate among different types of entropy schemes such as the wounded nucleon model (p = 1), KLN model (p ∼ −0.67), and IP-Glasma and EKRT (p ∼ 0) [55]. Throughout our calculations we fix the parameter p to p = 0, which is suggested by the Bayesian analyses [55].…”

Section: Modelmentioning

confidence: 99%

“…A parameter p in the function f (x) can interpolate among different types of entropy schemes such as the wounded nucleon model (p = 1), KLN model (p ∼ −0.67), and IP-Glasma and EKRT (p ∼ 0) [55]. Throughout our calculations we fix the parameter p to p = 0, which is suggested by the Bayesian analyses [55]. The initial distribution in the rapidity direction is described by g(x, η s ) = g(x, y)dy/dη s , where g(x, y) is constructed by the inverse Fourier transform of its cumulantgenerating function,…”

Section: Modelmentioning

confidence: 99%

“…Our parameters are the same as those in Ref. [55], except for the normalization N and σ 0 . We fix the centrality based on initial entropy densities.…”

Section: A Parameters In Computationsmentioning

confidence: 99%

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Temperature dependence of transport coefficients of QCD in high-energy heavy-ion collisions

Okamoto

Nonaka

2018

Phys. Rev. C

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Using our developed new relativistic viscous hydrodynamics code, we investigate the temperature dependence of shear and bulk viscosities from comparison with the ALICE data: single particle spectra and collective flows of Pb+Pb √ sNN = 2.76 TeV collisions at the Large Hadron Collider. We find that from the comprehensive analyses of centrality dependence of single particle spectra and collective flows, we can extract detailed information on the quark-gluon plasma bulk property, without the information being smeared by the final state interactions. I. INTRODUCTIONSince the success of production of strongly interacting quark-gluon plasma (QGP) at the Relativistic Heavy Ion Collider (RHIC) [1], a relativistic viscous hydrodynamic model has been widely used for the description of spacetime evolution of the hot and dense matter created after collisions. Now at RHIC as well as at the Large Hadron Collider (LHC) high-energy heavy-ion collisions are performed and many experimental data are reported. Because the relativistic viscous hydrodynamic equation has close a relation to an equation of state (EoS) and transport coefficients of the QCD matter, analyses of experimental data at RHIC and the LHC based on a relativistic viscous hydrodynamic model can provide an insight into the detailed information on the QGP bulk property.The recent development of a lattice QCD calculation for the EoS at vanishing chemical potential is remarkable. Two groups, the Wuppertal-Budapest and HotQCD Collaborations, report almost the same (pseudo)critical temperatures, T c = 155 ± 6 MeV [2] and T c = 154 ± 9 MeV [3], respectively. On the other hand, the evaluation of the shear viscosity to entropy density ratio η/s of the hadronic phase and the QGP phase is investigated based on the Boltzmann equation [4,5]. Due to the existence of the Kovtun-Son-Starinets (KSS) bound, the lower bound of η/s [6], η/s takes the minimum around the critical temperature [7]. On the other hand, the behavior of temperature dependence of the bulk viscosity to entropy density ratio is not clear. For example, ζ/s of a massive pion gas decreases with temperature [8,9] below the critical temperature. Also, above the critical temperature, ζ/s of quark-gluon matter [10] or gluon plasma [11] decreases with temperature. There is not a conclusive understanding of quantitative information on the transport coefficients of QCD matter.Therefore phenomenological analyses of transport coefficients from comparison with experimental data at RHIC and the LHC are indispensable [12][13][14][15][16][17][18][19]. It turns out that

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“…Our result suggests that a suitable η/s can be chosen between η/s = 0.08 and η/s = 0.17, which does not contradict the results of Ref. [55].…”

Section: B Constant Shear Viscosity With Vanishing Bulk Viscositysupporting

confidence: 74%

Section: Modelmentioning

confidence: 99%

Section: Modelmentioning

confidence: 99%

Section: Modelmentioning

confidence: 99%

“…Our parameters are the same as those in Ref. [55], except for the normalization N and σ 0 . We fix the centrality based on initial entropy densities.…”

Section: A Parameters In Computationsmentioning

confidence: 99%

See 3 more Smart Citations

Temperature dependence of transport coefficients of QCD in high-energy heavy-ion collisions

Okamoto

Nonaka

2018

Phys. Rev. C

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CGC for ultra-peripheral Pb+Pb collisions at the Large Hadron Collider: a more realistic calculation

Duan

Kovner

Skokov

2022

J. High Energ. Phys.

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We provide the first calculation of two-gluon production at mid-rapidity in ultra-peripheral collisions in the Color Glass Condensate framework. To estimate systematic uncertainty associated with poor understanding of the wave function of the nearly real photon, we consider two diametrically different models: the dilute quark-antiquark dipole approximation and a vector meson, in which color charge density is approximated by McLerran-Venugopalan model. In the experimentally relevant range, the target nucleus can be faithfully approximated by a highly saturated state. This simplification enables us to perform efficient numerical simulations and extract the two-gluon correlation functions and the associated azimuthal harmonics.

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Recent development of hydrodynamic modeling in heavy-ion collisions

2020

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We present a concise review of the recent development of relativistic hydrodynamics and its applications to heavy-ion collisions. Theoretical progress on the extended formulation of hydrodynamics towards out-ofequilibrium systems is addressed, emphasizing the so-called attractor solution. On the other hand, recent phenomenological improvements in the hydrodynamic modeling of heavy-ion collisions with respect to the ongoing Beam Energy Scan program, the quantitative characterization of transport coefficients in the three-dimensionally expanding quark-gluon plasma, the fluid description of small colliding systems, and some other interdisciplinary connections are discussed.

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Constraints on rapidity-dependent initial conditions from charged-particle pseudorapidity densities and two-particle correlations

Cited by 50 publications

References 94 publications

Temperature dependence of transport coefficients of QCD in high-energy heavy-ion collisions

Temperature dependence of transport coefficients of QCD in high-energy heavy-ion collisions

CGC for ultra-peripheral Pb+Pb collisions at the Large Hadron Collider: a more realistic calculation

Recent development of hydrodynamic modeling in heavy-ion collisions

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