Interferometric signatures of the temperature dependence of the specific shear viscosity in heavy-ion collisions

Plumberg, Christopher; Heinz, Ulrich

doi:10.1103/physrevc.91.054905

Cited by 11 publications

(24 citation statements)

References 37 publications

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“…Such comparisons have been [70][71][72][73][74][75][76][77][78][79][80][81][82] and will continue to be published elsewhere. Recent improvements of the code package include a module for pre-equilibrium evolution Landau-matched to viscous hydrodynamics [83], and the inclusion of bulk viscous effects as well as a module for the computation of Hanbury-Brown Twiss (HBT) two-particle correlations from the iEBE-VISHNU output are in progress.…”

Section: Discussionmentioning

confidence: 99%

The iEBE-VISHNU code package for relativistic heavy-ion collisions

Shen

Qiu

Song

et al. 2016

Computer Physics Communications

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The iEBE-VISHNU code package performs event-by-event simulations for relativistic heavy-ion collisions using a hybrid approach based on (2+1)-dimensional viscous hydrodynamics coupled to a hadronic cascade model. We present the detailed model implementation, accompanied by some numerical code tests for the package. iEBE-VISHNU forms the core of a general theoretical framework for model-data comparisons through large scale Monte-Carlo simulations. A numerical interface between the hydrodynamically evolving medium and thermal photon radiation is also discussed. This interface is more generally designed for calculations of all kinds of rare probes that are coupled to the temperature and flow velocity evolution of the bulk medium, such as jet energy loss and heavy quark diffusion. It is impossible to use external probes to study the properties of the quark-gluon plasma (QGP), a novel state of matter created during the collisions. Experiments can only measure the momentum information of stable hadrons, who are the remnants of the collisions. In order to extract the thermal and transport properties of the QGP, one needs to rely on Monte-Carlo event-by-event model simulations, which reverse-engineer the experimental measurements to the early time dynamics of the relativistic heavy-ion collisions. Solution method: Relativistic heavy-ion collisions contain multiple stages of evolution. The physics that governs each stage is implemented into individual code component. A general driver script glues all the modular packages as a whole to perform large-scale Monte-Carlo simulations. The final results are stored into SQLite database, which supports standard querying for massive data analysis. By tuning transport coefficients of the QGP as free parameters, e.g. the specific shear viscosity η/s, we can constrain various transport properties of the QGP through model-data comparisons. Keywords Running time:The following running time is tested on a laptop computer with a 2.4 GHz Intel Core i5 CPU, 4GB memory. All the C++ and Fortran codes are compiled with the GNU Compiler Collection (GCC) 4.9.2 and -O3 optimization.

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Section: Discussionmentioning

confidence: 99%

The iEBE-VISHNU code package for relativistic heavy-ion collisions

Shen

Qiu

Song

et al. 2016

Computer Physics Communications

Self Cite

465

486

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show abstract

“…As discussed in Refs. [2,4], this increased variance at higher K T can be attributed to the contribution to R 2 o from the emission duration, β 2 T t 2 − t 2 , which strongly fluctuates at large K T . These increasing fluctuations of the emission duration are generic and occur whether or not resonance decay contributions are included.…”

Section: B Hbt Radii Including Resonance Decays: Sv Methodsmentioning

confidence: 98%

“…The studies presented in Refs. [2][3][4] have answered the first question in the affirmative, and have addressed the second question by demonstrating that experimental measurements of the statistical moments of HBT distributions could potentially yield sensitivity to other interesting quantities, such as the value (and temperature dependence) of the specific shear viscosity η/s in the quark-gluon plasma (QGP). Probing HBT distributions experimentally may therefore yield valuable insights into the properties of relativistic heavy-ion collisions.…”

Section: Introductionmentioning

confidence: 99%

“…These interactions lead to a reduction of particle pairs at small q. Fortunately, it is possible to account for these interactions in the experimental construction of the correlation function[26]. We here assume that the ensemble-averaged correlation function(2) represents such a Coulomb-corrected correlation function, and focus on the correlation effects caused by quantum statistics.…”

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confidence: 99%

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Hanbury-Brown–Twiss correlation functions and radii from event-by-event hydrodynamics

Plumberg

Heinz

2018

Phys. Rev. C

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HoTCoffeeh (Hanbury Brown-Twiss Correlation f unctions and radii f rom event-by-event hydrodynamics) is a new computational tool which determines Hanbury Brown-Twiss (HBT) charged pion (π + ) correlation functions and radii for event-by-event (EBE) hydrodynamics with fluctuating initial conditions in terms of Cooper-Frye integrals, including resonance decay contributions. In this paper, we review the basic formalism for computing the HBT correlation functions and radii with resonance decay contributions included, and discuss our implementation of this formalism in the form of HoTCoffeeh. This tool may be easily integrated with other numerical packages (e.g., [1]) for the purpose of simulating the evolution of heavy-ion collisions and thereby extracting predictions for heavy-ion observables.

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“…On the freeze-out surface of hydrodynamic sources, the pion emission function is defined by the Cooper-Frye integral [24][25][26][27]…”

Section: Calculations Of Hbt For Hydrodynamic Sourcesmentioning

confidence: 99%

Finite size of hadrons and HBT interferometry for hydrodynamic sources

Zhang

Yin

2019

Int. J. Mod. Phys. E

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Hadrons formed in heavy-ion collisions are not point-like objects, they cannot occupy too close space-time points. When the two bosons are too close to each other, their constituents start to mix and they cannot be considered as bosons subjected to Bose-Einstein statistics, this effect is called excluded volume effect. We study the volume effect on HBT for the sources with various sizes. The effect on HBT was shown in out, side and long directions, and it is more obvious for the source with a narrow space-time distribution. The correlation functions for high transverse momenta are more suppressed by the volume effect. Hence the incoherence parameter may be more suppressed by the volume effect for high transverse momenta in small collision systems.

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Interferometric signatures of the temperature dependence of the specific shear viscosity in heavy-ion collisions

Cited by 11 publications

References 37 publications

The iEBE-VISHNU code package for relativistic heavy-ion collisions

The iEBE-VISHNU code package for relativistic heavy-ion collisions

Hanbury-Brown–Twiss correlation functions and radii from event-by-event hydrodynamics

Finite size of hadrons and HBT interferometry for hydrodynamic sources

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