4.5 Article

Assessing the ultracentral flow puzzle in hydrodynamic modeling of heavy-ion collisions

Related references

Note: Only part of the references are listed.
Article Astronomy & Astrophysics

New constraints for QCD matter from improved Bayesian parameter estimation in heavy-ion collisions at LHC

J. E. Parkkila et al.

Summary: The transport properties of quark-gluon plasma created in relativistic heavy-ion collisions are quantified using an improved global Bayesian analysis. The study shows that including new collective flow observables reduces the uncertainty of the extracted transport coefficients. The research reveals the temperature dependence of specific shear viscosity, the value of specific bulk viscosity, and the hadronization switching temperature.

PHYSICS LETTERS B (2022)

Article Physics, Nuclear

Predictions and postdictions for relativistic lead and oxygen collisions with the computational simulation code TRAJECTUM

Govert Nijs et al.

Summary: This study introduces a global analysis method to make precise predictions for relativistic heavy ion collisions, including estimates of statistical and systematic uncertainties. The results are compared with experimental data and show satisfactory agreement.

PHYSICAL REVIEW C (2022)

Article Physics, Multidisciplinary

Phenomenological Constraints on the Transport Properties of QCD Matter with Data-Driven Model Averaging

D. Everett et al.

Summary: This study utilizes combined data from different colliders to constrain the shear and bulk viscosities of quark-gluon plasma (QGP) at specific temperatures, providing the most reliable phenomenological constraints to date by using Bayesian inference and model averaging.

PHYSICAL REVIEW LETTERS (2021)

Article Physics, Multidisciplinary

Transverse Momentum Differential Global Analysis of Heavy-Ion Collisions

Govert Nijs et al.

Summary: Understanding heavy ion collisions and the formation of quark-gluon plasma (QGP) requires a complex interplay of rich physics based on experimental data. By comparing the transverse momentum dependence of identified particles in PbPb and pPb collisions, this study shows different physical characteristics in the QGP formation process. Introducing a free streaming velocity variable in a global model fit widens the scope of initial conditions, while varying three second order transport coefficients during the hydrodynamic phase.

PHYSICAL REVIEW LETTERS (2021)

Article Physics, Nuclear

Bayesian estimation of the specific shear and bulk viscosity of the quark-gluon plasma with additional flow harmonic observables

J. E. Parkkila et al.

Summary: The study reveals that the temperature dependence of the specific shear viscosity in the strongly coupled quark-gluon plasma created in ultrarelativistic heavy-ion collisions is weaker than previously thought. To reproduce additional observables, lower values of specific bulk viscosity and higher switching temperatures are preferred. The analysis benefits the most from using symmetric cumulants and nonlinear flow modes to constrain the temperature dependence of specific shear and bulk viscosities.

PHYSICAL REVIEW C (2021)

Article Physics, Nuclear

Determining the jet transport coefficient (q)over-cap from inclusive hadron suppression measurements using Bayesian parameter estimation

S. Cao et al.

Summary: This study presents a new determination of the jet transport coefficient of the quark-gluon plasma using the JETSCAPE framework and Bayesian inference. The functional dependence of (q) over cap on jet energy or virtuality and medium temperature is based on in-medium scattering, with components reflecting the different regimes of applicability of MATTER and LBT models. The posterior model predictions show reasonable agreement with experimental data from RHIC and LHC, with moderate tension in limited regions of phase space.

PHYSICAL REVIEW C (2021)

Article Physics, Nuclear

Modified equilibrium distributions for Cooper-Frye particlization

M. McNelis et al.

Summary: We introduce a positive-definite single-particle distribution suitable for describing the transition from macroscopic hydrodynamic to microscopic kinetic description during late-stage heavy-ion collisions with moderately large viscous corrections. The modified equilibrium distribution significantly improves upon customary linearized approximations for nonequilibrium corrections, avoiding unphysical negative distribution functions at high particle momenta.

PHYSICAL REVIEW C (2021)

Article Physics, Nuclear

Bayesian analysis of heavy ion collisions with the heavy ion computational framework TRAJECTUM

Govert Nijs et al.

Summary: This paper introduces a model for heavy ion collisions called TRAJECTUM, which includes an expanded initial stage and a hydrodynamic stage. A Gaussian emulator is used to obtain Bayesian posterior estimates on the parameters, and these estimates are tested through closure tests and convergence studies. Finally, optimal parameter values are used to compare experimental data.

PHYSICAL REVIEW C (2021)

Article Physics, Nuclear

Multisystem Bayesian constraints on the transport coefficients of QCD matter

D. Everett et al.

Summary: By combining different modules, we studied the properties of strongly coupled quark-gluon plasma. Our research emphasizes the importance of validation process and the constraints and sensitivity of experimental data on the viscosity of quark-gluon plasma. We also explored the impact of different model parameters on observational results.

PHYSICAL REVIEW C (2021)

Article Physics, Nuclear

Gluonic hot spot initial conditions in heavy-ion collisions

R. Snyder et al.

Summary: Initial conditions in heavy-ion collisions are calculated in various frameworks, with a focus on nucleon position fluctuations and subnucleon structure. However, there are outstanding puzzles regarding these initial conditions, including the measurement of flow coefficients. Recent magma calculations incorporating gluonic hot spots in the color glass condensate framework match experimental results but do not fully describe the data, prompting further exploration of alternative initial condition calculations and their implications.

PHYSICAL REVIEW C (2021)

Article Physics, Particles & Fields

Fluctuations of anisotropic flow in Pb plus Pb collisions at √sNN=5.02 TeV with the ATLAS detector

M. Aaboud et al.

JOURNAL OF HIGH ENERGY PHYSICS (2020)

Article Astronomy & Astrophysics

The mean transverse momentum of ultracentral heavy-ion collisions: A new probe of hydrodynamics

Fernando G. Gardim et al.

PHYSICS LETTERS B (2020)

Article Physics, Nuclear

Possible octupole deformation of 208Pb and the ultracentral v2 to v3 puzzle

P. Carzon et al.

PHYSICAL REVIEW C (2020)

Article Physics, Multidisciplinary

Bayesian estimation of the specific shear and bulk viscosity of quark-gluon plasma

Jonah E. Bernhard et al.

NATURE PHYSICS (2019)

Review Physics, Nuclear

Hot-dense Lattice QCD

Alexei Bazavov et al.

EUROPEAN PHYSICAL JOURNAL A (2019)

Article Physics, Particles & Fields

QCD shear viscosity at (almost) NLO

Jacopo Ghiglieri et al.

JOURNAL OF HIGH ENERGY PHYSICS (2018)

Article Physics, Particles & Fields

Energy dependence and fluctuations of anisotropic flow in Pb-Pb collisions at √sNN=5.02 and 2.76 TeV

S. Acharya et al.

JOURNAL OF HIGH ENERGY PHYSICS (2018)

Article Physics, Nuclear

Glauber modeling of high-energy nuclear collisions at the subnucleon level

C. Loizides

PHYSICAL REVIEW C (2016)

Correction Astronomy & Astrophysics

Derivation of transient relativistic fluid dynamics from the Boltzmann equation (vol 85, 114047, 2012)

G. S. Denicol et al.

PHYSICAL REVIEW D (2015)

Article Physics, Nuclear

Extracting the bulk viscosity of the quark-gluon plasma

Jean-Bernard Rose et al.

NUCLEAR PHYSICS A (2014)

Article Astronomy & Astrophysics

Equation of state in (2+1)-flavor QCD

A. Bazavov et al.

PHYSICAL REVIEW D (2014)

Article Physics, Particles & Fields

Studies of azimuthal dihadron correlations in ultra-central PbPb collisions at=2.76 TeV

S. Chatrchyan et al.

JOURNAL OF HIGH ENERGY PHYSICS (2014)

Article Physics, Nuclear

Highlights from CMS

Gunther Roland

NUCLEAR PHYSICS A (2013)

Article Astronomy & Astrophysics

Derivation of transient relativistic fluid dynamics from the Boltzmann equation

G. S. Denicol et al.

PHYSICAL REVIEW D (2012)

Review Physics, Nuclear

Transport properties of the quark-gluon plasma A lattice QCD perspective

Harvey B. Meyer

EUROPEAN PHYSICAL JOURNAL A (2011)

Article Physics, Multidisciplinary

Dissipative Relativistic Fluid Dynamics: A New Way to Derive the Equations of Motion from Kinetic Theory

G. S. Denicol et al.

PHYSICAL REVIEW LETTERS (2010)

Article Physics, Nuclear

Effect of bulk viscosity on elliptic flow near the QCD phase transition

G. S. Denicol et al.

PHYSICAL REVIEW C (2009)

Article Astronomy & Astrophysics

Hadronic dissipative effects on elliptic flow in ultrarelativistic heavy-ion collisions

Tetsufumi Hirano et al.

PHYSICS LETTERS B (2006)