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doi:10.1103/physrevlett.116.132302

Cited by 178 publications

(149 citation statements)

References 61 publications

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130

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“…At LHC, the v 2 in √ s = 5.02 TeV p+Pb collisions was found to be smaller than that in Pb+Pb collisions at the same multiplicity [81][82][83]. This is not inconsistent with our results as at the higher LHC energy hydrodynamics gains in relative importance because higher en-ergy densities lead to longer fireball lifetimes.…”

Section: Arxiv:190806212v1 [Nucl-th] 17 Aug 2019supporting

confidence: 55%

Hybrid Color Glass Condensate and hydrodynamic description of the Relativistic Heavy Ion Collider small system scan

Schenke¹,

Shen²,

Tribedy³

2020

Physics Letters B

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Multi-particle correlation observables in the Relativistic Heavy Ion Collider small system scan are computed in a framework that contains both initial state momentum anisotropies from the Color Glass Condensate effective theory and final state hydrodynamic evolution. The initial state is computed using the IP-Glasma model and coupled to viscous relativistic hydrodynamic simulations, which are followed by microscopic hadronic transport. All parameters of the calculation were previously constrained using experimental data on Au+Au collisions at the same center of mass energy. We find that the qualitative features of the experimental data, such as the system and centrality dependence of the charged hadron momentum anisotropy, can only be reproduced when final state interactions are present. On the other hand, we also demonstrate that the details of the initial state are crucially important for the quantitative description of observables in the studied small systems, as neglecting the initial transverse flow profile or the initial shear stress tensor, which contain information on the momentum anisotropy from the Color Glass Condensate, has dramatic effects on the produced final state anisotropy. We further show that the initial state momentum anisotropy is correlated with the observed elliptic flow in all small systems, with the effect increasing with decreasing multiplicity. We identify the precise measurement of v2 in d+Au and Au+Au collisions at RHIC energy at the same multiplicity as a means to reveal effects of the initial state momentum anisotropy.

show abstract

Section: Arxiv:190806212v1 [Nucl-th] 17 Aug 2019supporting

confidence: 55%

Hybrid Color Glass Condensate and hydrodynamic description of the Relativistic Heavy Ion Collider small system scan

Schenke¹,

Shen²,

Tribedy³

2020

Physics Letters B

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“…The most studied example in the context of AdS/CFT correspondence [7,14,15] is the duality between the N = 4 SU (N c ) super-Yang-Mills theory and type IIB string theory on AdS 5 × S 5 , which allows one to study this strongly coupled gauge theory in the large N c limit and large t Hooft coupling λ = g 2 Y M N c .The ratio of shear viscosity over entropy density obtained from this duality is small η/s = 1/4π [5,16,17] which is consistent with the experimental data [18]. Also, the strong collective behavior observed in very small systems, such as Au-Au collisions at RHIC [19][20][21], Pb-Pb [22][23][24][25], p-Pb [26-28] and p-p [29] collisions at the LHC are well described by hydrodynamics from the time and distance scales as a fraction of the (local) inverse temperature [30][31][32][33][34][35] which is consistent with holographic results [36,37].Despite the fact that the initial temperatures in the most central, high-energy collisions at in the range of quasi-conformal regime the non-conformal effects become important in the subsequent evolution and cooling of the QGP after production. Also, the initial temperature is smaller in the off-central or lower-energy collisions both at the LHC and RHIC.…”

supporting

confidence: 80%

Jet suppression in non-conformal plasma using AdS/CFT

Heshmatian

Morad

2019

J. High Energ. Phys.

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Recent experiments performed at the Relativistic Heavy Ion Collider (RHIC) and the Large Hadron Collider (LHC) has provided spectacular evidence that suggests that a deconfined state of hadronic matter has been formed which is called quark-gluon plasma (QGP) [1][2][3][4]. The experimental discovery, e.g, a very small ratio of shear viscosity to entropy density [5,6], quenching of high energy partons with large transverse momentum, and elliptic flow etc., indicates that QGP is a strongly coupled plasma whose dynamics after collision is dominated by non-perturbative effects [7,8]. The perturbative QCD works only in the weak coupling regime, while lattice QCD is the proper tool for understanding the static equilibrium thermodynamics of such strongly coupled plasma, it does not allow us to compute some dynamical quantities like transport coefficients, drag force, and jet quenching parameter etc., in the strong coupling regime.Recently, a novel tool called the "AdS/CFT correspondence" [9-13] provide a powerful tool to study the strongly coupled plasma. The most studied example in the context of AdS/CFT correspondence [7,14,15] is the duality between the N = 4 SU (N c ) super-Yang-Mills theory and type IIB string theory on AdS 5 × S 5 , which allows one to study this strongly coupled gauge theory in the large N c limit and large t Hooft coupling λ = g 2 Y M N c .The ratio of shear viscosity over entropy density obtained from this duality is small η/s = 1/4π [5,16,17] which is consistent with the experimental data [18]. Also, the strong collective behavior observed in very small systems, such as Au-Au collisions at RHIC [19][20][21], Pb-Pb [22][23][24][25], p-Pb [26-28] and p-p [29] collisions at the LHC are well described by hydrodynamics from the time and distance scales as a fraction of the (local) inverse temperature [30][31][32][33][34][35] which is consistent with holographic results [36,37].Despite the fact that the initial temperatures in the most central, high-energy collisions at in the range of quasi-conformal regime the non-conformal effects become important in the subsequent evolution and cooling of the QGP after production. Also, the initial temperature is smaller in the off-central or lower-energy collisions both at the LHC and RHIC. Lattice data indicate that in the temperature range available at high-energy heavy ion collisions (temperatures a few times larger than the critical temperature), the QGP

show abstract

“…The v n values (n < 5) are equivalent to those in Ref. [11]. The fifth-order flow harmonic v 5 is shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…VI describe the measured v n data shown in Sec. V. v n results presented in this section are for charged particles in the pseudorapidity range |η| < 0.8 and the transverse momentum range 0.2 < p T < 5.0 GeV/c as a function of collision centrality [11].…”

Section: Appendix: Model Comparisons Of the Individual Flow Harmonicsmentioning

confidence: 99%

Systematic studies of correlations between different order flow harmonics in Pb-Pb collisions at sNN=2.76 TeV

Acharya¹,

Adam²,

Adamová³

et al. 2018

Phys. Rev. C

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The correlations between event-by-event fluctuations of anisotropic flow harmonic amplitudes have been measured in Pb-Pb collisions at √ s NN = 2.76 TeV with the ALICE detector at the Large Hadron Collider.The results are reported in terms of multiparticle correlation observables dubbed symmetric cumulants. These observables are robust against biases originating from nonflow effects. The centrality dependence of correlations between the higher order harmonics (the quadrangular v 4 and pentagonal v 5 flow) and the lower order harmonics (the elliptic v 2 and triangular v 3 flow) is presented. The transverse momentum dependences of correlations between v 3 and v 2 and between v 4 and v 2 are also reported. The results are compared to calculations from viscous hydrodynamics and a multiphase transport (AMPT) model calculations. The comparisons to viscous hydrodynamic models demonstrate that the different order harmonic correlations respond differently to the initial conditions and the temperature dependence of the ratio of shear viscosity to entropy density (η/s). A small average value of η/s is favored independent of the specific choice of initial conditions in the models. The calculations with the AMPT initial conditions yield results closest to the measurements. Correlations among the magnitudes of v 2 , v 3 , and v 4 show moderate p T dependence in midcentral collisions. This might be an indication of possible viscous corrections to the equilibrium distribution at hadronic freeze-out, which might help to understand the possible contribution of bulk viscosity in the hadronic phase of the system. Together with existing measurements of individual flow harmonics, the presented results provide further constraints on the initial conditions and the transport properties of the system produced in heavy-ion collisions.

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Anisotropic Flow of Charged Particles in Pb-Pb Collisions atsNN=5.02 TeV

Cited by 178 publications

References 61 publications

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Systematic studies of correlations between different order flow harmonics in Pb-Pb collisions at sNN=2.76 TeV

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