Fluctuating initial conditions in hydrodynamics for two-particle correlations

Hama, Yogiro; Andrade, Raquel Dully; Grassi, F.; Qian, Wei-Liang

doi:10.5689/ua-proc-2010-09/17

Cited by 8 publications

(14 citation statements)

References 24 publications

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“…More specifically, the data show the existence of structures in the two-particle correlations plotted as function of the pseudorapidity difference ∆η and the angular spacing ∆φ. In [5,6] it has been argued that these structures may have a common hydrodynamic origin: the combined effect of longitudinal high energy density tubes (leftover from initial particle collisions) and transverse expansion.…”

Section: Introductionmentioning

confidence: 99%

On the radial expansion of tubular structures in a quark–gluon plasma

2012

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We study the radial expansion of cylindrical tubes in a hot QGP. These tubes are treated as perturbations in the energy density of the system which is formed in heavy ion collisions at RHIC and LHC. We start from the equations of relativistic hydrodynamics in two spatial dimensions and cylindrical symmetry and perform an expansion of these equations in a small parameter, conserving the nonlinearity of the hydrodynamical formalism. We consider both ideal and viscous fluids and the latter are studied with a relativistic Navier-Stokes equation. We use the equation of state of the MIT bag model. In the case of ideal fluids we obtain a breaking wave equation for the energy density fluctuation, which is then solved numerically. We also show that, under certain assumptions, perturbations in a relativistic viscous fluid are governed by the Burgers equation. We estimate the typical expansion time of the tubes.

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Section: Introductionmentioning

confidence: 99%

On the radial expansion of tubular structures in a quark–gluon plasma

2012

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“…Figure 3 (right) shows that this is indeed the case. We have checked that this structure is robust by studying the effect of several parameters of the model [23]. 6 assoc.…”

Section: Mechanism Ofridge Formation -One-tube Modelmentioning

confidence: 96%

“…In [22], the events computed by using the hydrodynamic code SPheRIO [5], starting from event-by-event fluctuating IC, generated by NeXus [6], were analyzed in a similar way to the experimental ones, in particular the ZYAM method was used to remove effects of elliptic flow. We later developed a different method to remove elliptic flow from our data and checked that all structures are indeed exhibited and other features well reproduced (dependence on the trigger-or associated-particle transverse momentum, centrality, in-plane/out-of-plane trigger, etc) [23,24,25,26].…”

Section: Two-particle Correlations In Hydrodynamic Approachmentioning

confidence: 99%

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Proceedings of RIKEN BNL Research Center Workshop: Initial State Fluctuations and Final-State Particle Correlations

Dumitru¹,

Molnár²

2011

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The Memorandum of Understanding between RIKEN and BNL, initiated in 1997, has been renewed in 2002 and again in 2007. The Center is dedicated to the study of strong interactions, including spin physics, lattice QCD, and RHIC physics through the nurturing of a new generation of young physicists. The RBRC has both a theory and experimental component. The RBRC Theory Group and the RBRC Experimental Group consists of a total of 25-30 researchers. Positions include the following: full time RBRC Fellow, half-time RHIC Physics Fellow, and full-time, post-doctoral Research Associate. The RHIC Physics Fellows hold joint appointments with RBRC and other institutions and have tenure track positions at their respective universities or BNL. To date, RBRC has-100 graduates of which 27 theorists and 14 experimenters have attained tenure positions at major institutions worldwide. Beginning in 2001 a new RIKEN Spin Program (RSP) category was implemented at RBRC. These appointments are joint positions of RBRC and RIKEN and include the following positions in theory and experiment: RSP Researchers, RSP Research Associates, and Young Researchers, who are mentored by senior RBRC Scientists. A number of RIKEN Jr. Research Associates and Visiting Scientists also contribute to the physics program at the Center. RBRC has an active workshop program on strong interaction physics with each workshop focused on a specific physics problem. In most cases all the talks are made available on the RBRC website. In addition, highlights to each speaker's presentation are collected to form proceedings which can therefore be made available within a short time after the workshop. To date there are one hundred and one proceeding volumes available. A 10 teraflops RBRC QCDOC computer funded by RIKEN, Japan, was unveiled at a dedication ceremony at BNL on May 26, 2005.

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“…Hydrodynamical studies [1,2] indicate that some experimental features observed at RHIC and LHC can be understood if it is assumed that these tubes survive the thermalization stage and form "tubular" structures that persist for some time during the hydrodynamical expansion in the thermalized quark-gluon plasma (QGP). In [1,2] it has been argued that these structures may have a common hydrodynamic origin: the combined effect of longitudinal high energy density tubes (leftover from initial particle collisions) and transverse expansion. Such tubular structures, which are nearly uniform in the longitudinal direction, may be considered as cylindrical perturbations in the energy density upon a continuous background as depicted in Fig.…”

Section: Introductionmentioning

confidence: 99%

The evolution of tubular structures in a viscous quark gluon plasma

Navarra¹,

Fogaça²,

Filho³

2012

Proceedings of Sixth International Conference on Quarks and Nuclear Physics — PoS(QNP2012)

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We study the radial expansion of cylindrical tubes in a hot QGP described by the equation of state of the MIT bag model. These tubes are treated as perturbations in the energy density of the system which is formed in heavy ion collisions at RHIC and LHC. We start from the equations of viscous relativistic hydrodynamics in two spatial dimensions with cylindrical symmetry and perform an expansion of these equations in a small parameter, conserving the nonlinearity of the hydrodynamical formalism. The relativistic viscous fluid is studied with a relativistic NavierStokes equation and the perturbations are governed by the Burgers equation. We estimate the typical expansion time of the tubes.

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Fluctuating initial conditions in hydrodynamics for two-particle correlations

Cited by 8 publications

References 24 publications

On the radial expansion of tubular structures in a quark–gluon plasma

On the radial expansion of tubular structures in a quark–gluon plasma

Proceedings of RIKEN BNL Research Center Workshop: Initial State Fluctuations and Final-State Particle Correlations

The evolution of tubular structures in a viscous quark gluon plasma

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