Hydrodynamic radial and elliptic flow in heavy-ion collisions from AGS to LHC energies

Kestin, Gregory; Heinz, Ulrich

doi:10.1140/epjc/s10052-008-0832-y

Cited by 47 publications

(56 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…3 the elliptic-flow coefficient v 2 of charged particles is shown as a function of transverse-momentum. Compared to the analogous RHIC plots, the dependence of v 2 on p ⊥ exhibits saturation with increasing beam energy, as observed by Kestin and Heinz [24]. However, the substantial increase of the initial entropy density (matching the expected rapid growth of the multiplicity with energy) and the hard equation of state used in the calculations lead to a significant increase of p ⊥ and the integrated elliptic flow when going from from RHIC to the LHC.…”

supporting

confidence: 50%

Hydrodynamic predictions for Pb + Pb collisions at sNN=2.76 TeV

et al. 2010

View full text Add to dashboard Cite

Using the newest data for pp scattering at the CERN Large Hadron Collider (LHC) combined with the Glauber model, we make hydrodynamic predictions for the soft hadronic observables planned to be measured in the forthcoming Pb+Pb collisions at √ s NN = 2.76 TeV. 25.75.Dw, 21.65.Qr PACS 1.The behavior of matter created in relativistic heavy-ion collisions at the BNL Relativistic Heavy Ion Collider (RHIC) is very well described by the perfect-fluid hydrodynamics [1,2,3,4,5,6,7,8,9]. Having in mind these successes, it is appealing to use perfect-fluid hydrodynamics to make predictions for the Pb+Pb collisions at the LHC. Several such studies have been performed so far and they are summarized in Ref.[10].Nevertheless, in the last two years two important aspects concerning the heavy-ion physics at the LHC have changed: Firstly, the forthcoming heavy-ion experiments will have a lower energy than that planned previously, √ s NN = 2.76TeV instead of √ s NN = 5.5 TeV. Secondly, the data for pp scattering at the LHC have just been analyzed. These new facts suggest that a revised prediction for √ s NN = 2.76 TeV based on the newest pp results is advisable.In the paper we follow this idea and use the newest data for pp scattering at the LHC to make hydrodynamic predictions for soft hadronic observables

show abstract

supporting

confidence: 50%

Hydrodynamic predictions for Pb + Pb collisions at sNN=2.76 TeV

et al. 2010

View full text Add to dashboard Cite

show abstract

“…To further illustrate this point we plot in Fig. 5 the A similar behavior was seen in [47] for ideal hydrodynamics with a bag-model equation of state which features a strong minimum ("softest point") in the speed of sound at the phase transition temperature. We see that the existence of this maximum does not depend on the appearance of a softest point in the EOS.…”

Section: Charged Particle Pt -Spectra and Differential Elliptic mentioning

confidence: 67%

“…We do not expect qualitative changes to the conclusions drawn in this paper once our assumed values will be replaced by actual measurements. tion and therefore use the empirical formula [47] dN ch dη = 312.5 log 10 √ s − 64.8.…”

Section: Evolution Of Charged Hadron Multiplicity and Total Ellipmentioning

confidence: 99%

Collision energy dependence of viscous hydrodynamic flow in relativistic heavy-ion collisions

Shen

Heinz

2012

Phys. Rev. C

Self Cite

View full text Add to dashboard Cite

Using a (2+1)-d viscous hydrodynamical model, we study the dependence of flow observables on the collision energy ranging from √ s = 7.7 A GeV at the Relativistic Heavy Ion Collider (RHIC) to √ s = 2760 A GeV at the Large Hadron Collider (LHC). With a realistic equation of state, Glauber model initial conditions and a small specific shear viscosity η/s = 0.08, the differential charged hadron elliptic flow v ch 2 (pT , √ s) is found to exhibit a very broad maximum as a function of √ s around top RHIC energy, rendering it almost independent of collision energy for 39 ≤ √ s ≤ 2760 A GeV. Compared to ideal fluid dynamical simulations, this "saturation" of elliptic flow is shifted to higher collision energies by shear viscous effects. For color-glass motivated MC-KLN initial conditions, which require a larger shear viscosity η/s = 0.2 to reproduce the measured elliptic flow, a similar "saturation" is not observed up to LHC energies, except for very low pT . We emphasize that this "saturation" of the elliptic flow is not associated with the QCD phase transition, but arises from the interplay between radial and elliptic flow which shifts with √ s depending on the fluid's viscosity and leads to a subtle cancellation between increasing contributions from light and decreasing contributions from heavy particles to v2 in the √ s range where v ch 2 (pT , √ s) at fixed pT is maximal. By generalizing the definition of spatial eccentricity ǫx to isothermal hyper-surfaces, we calculate ǫx on the kinetic freeze-out surface at different collision energies. Up to top RHIC energy, √ s = 200 A GeV, the fireball is still out-of-plane deformed at freeze out, while at LHC energy the final spatial eccentricity is predicted to approach zero.

show abstract

“…The beam-energy dependence of the collective flow has been recently studied within several different models [3][4][5][6][7][8][9][10][11][12][13] with the main emphasis on search of signals of the onset of deconfinement. A non-monotonicity of the transverse-momentum integrated (p t -integrated) v 2 was predicted in Ref.…”

Section: Introductionmentioning

confidence: 99%

Elliptic flow in heavy-ion collisions at energiessNN=2.7–39GeV

Ivanov

Soldatov

2015

Phys. Rev. C

View full text Add to dashboard Cite

The transverse-momentum integrated elliptic flow of charged particles at midrapidity, v2(charged), and that of identified hadrons from Au+Au collisions are computed in a wide range of incident energies 2.7 GeV ≤ √ sNN ≤ 39 GeV. The simulations are performed within a three-fluid model employing three different equations of state (EoS's): a purely hadronic EoS and two versions of the EoS involving the deconfinement transition-a first-order phase transition and a smooth crossover one. The present simulations demonstrate low sensitivity of v2(charged) to the EoS. All considered scenarios equally well reproduce recent STAR data on v2(charged) for mid-central Au+Au collisions and properly describe its change of sign at the incident energy decrease below √ sNN ≈ 3.5 GeV.The predicted integrated elliptic flow of various species exhibits a stronger dependence on the EoS. A noticeable sensitivity to the EoS is found for anti-baryons and, to a lesser extent, for K − mesons. In particular, the v2 excitation functions of anti-baryons exhibit a non-monotonicity within the deconfinement scenarios that was predicted by Kolb, Sollfrank and Heinz. However, low multiplicities of anti-baryons at √ sNN ≤ 10 GeV result in large fluctuations of their v2 which may wash out this non-monotonicity.

show abstract

Hydrodynamic radial and elliptic flow in heavy-ion collisions from AGS to LHC energies

Cited by 47 publications

References 42 publications

Hydrodynamic predictions for Pb + Pb collisions at sNN=2.76 TeV

Hydrodynamic predictions for Pb + Pb collisions at sNN=2.76 TeV

Collision energy dependence of viscous hydrodynamic flow in relativistic heavy-ion collisions

Elliptic flow in heavy-ion collisions at energiessNN=2.7–39GeV

Contact Info

Product

Resources

About