Anisotropic hydrodynamics for conformal Gubser flow

Strickland, Michael; Nopoush, Mohammad; Ryblewski, Radosław

doi:10.1016/j.nuclphysa.2016.02.014

Cited by 21 publications

(16 citation statements)

References 59 publications

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“…Plugging the leading-order terms listed in Eqs. (27) or (29) into Eq. (17) gives an eightdimensional integral for the small ξ limit for the case of classical and quantum statistics, respectively.…”

Section: Matching To Rtamentioning

confidence: 99%

“…Faced with the existence of an anisotropic dynamical attractor, it is natural to consider fluids that have intrinsic, and potentially large, momentum-space anisotropies. The framework of anisotropic hydrodynamics (aHydro) was introduced some years ago [17,18] to do just this and has since been extended and applied to QGP phenomenology [19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35] (for a recent aHydro review see Ref. [9]).…”

Section: Introductionmentioning

confidence: 99%

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Anisotropic hydrodynamics with a scalar collisional kernel

Almaalol

Strickland

2018

Phys. Rev. C

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Prior studies of non-equilibrium dynamics using anisotropic hydrodynamics have used the relativistic Anderson-Witting scattering kernel or some variant thereof. In this paper, we make the first study of the impact of using a more realistic scattering kernel. For this purpose, we consider a conformal system undergoing transversally-homogenous and boost-invariant Bjorken expansion and take the collisional kernel to be given by the leading order 2 ↔ 2 scattering kernel in scalar λφ 4 . We consider both classical and quantum statistics in order to assess the impact of Bose enhancement on the dynamics. We also determine the anisotropic non-equilibrium attractor of a system subject to this collisional kernel. We find that, when the near-equilibrium relaxation-times in the Anderson-Witting and scalar collisional kernels are matched, the scalar kernel results in a higher degree of momentum-space anisotropy during the system's evolution, given the same initial conditions. Additionally, we find that taking into account Bose enhancement further increases the dynamically generated momentum-space anisotropy.

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Section: Matching To Rtamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Anisotropic hydrodynamics with a scalar collisional kernel

Almaalol

Strickland

2018

Phys. Rev. C

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“…There has been a significant body of work produced since the two early aHydro papers [51,52], which has extended the aHydro formalism to full 3+1d dynamics, self-consistent inclusion of non-conformality of the QGP using a quasiparticle framework, etc. [56,60,[62][63][64][65][66][67][68][69][70][71][72][73][74][75][76][77][78][79]. For a recent aHydro review, we refer the reader to Ref.…”

Section: Introductionmentioning

confidence: 99%

Anisotropic hydrodynamic modeling of 200 GeV Au-Au collisions

2019

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We compare phenomenological results from 3+1d quasiparticle anisotropic hydrodynamics (aHy-droQP) with experimental data collected in RHIC 200 GeV Au-Au collisions. We present comparisons of identified particle spectra in different centrality clases, charged particle multiplicity versus pseudorapidity, identified particle multiplicity versus centrality across a wide range of particle species, identified particle elliptic flow versus transverse momentum, and charged particle elliptic flow as a function of transverse momentum and rapidity. We use the same aHydroQP and hadronic production/feed down codes that were used previously to describe LHC 2.76 TeV data. The aHydroQP hydrodynamic model includes the effects of both shear and bulk viscosities in addition to an infinite number of transport coefficients computed self-consistently in the relaxation time approximation. To convert to the final state hadrons, we use anisotropic Cooper-Frye freeze-out performed on a fixed-energy-density hypersurface and compute the production/feed down using a customized version of Therminator 2. We find good agreement with many heavy-ion collision observables using only smooth Glauber initial conditions parameterized by an initial central temperature of T 0 = 455 MeV, a constant shear viscosity to entropy density ratio η/s = 0.179, and a switching (freeze-out) temperature of T FO = 130 MeV.

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“…The anisotropy tensor is traceless, i.e.ξ µ µ = 0, and orthogonal to the flow, i.e.û µξ µν = 0. Using the tensorΞ µν , one can construct an anisotropic distribution function for a conformal system [96,144] f (x,p) = f eq 1…”

Section: Leading-order Ahydro For Gubser Flowmentioning

confidence: 99%

“…These generalized frameworks have been applied successfully to heavy-ion collision phenomenology (see e.g. [87][88][89][90][91][92][93][94][95][96][97][98][99][100][101][102][103][104]).…”

Section: Introductionmentioning

confidence: 99%

Relativistic anisotropic hydrodynamics

Alqahtani

Nopoush

Strickland

2018

Progress in Particle and Nuclear Physics

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118

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In this paper we review recent progress in relativistic anisotropic hydrodynamics. We begin with a pedagogical introduction to the topic which takes into account the advances in our understanding of this topic since its inception. We consider both conformal and non-conformal systems and demonstrate how one can implement a realistic equation of state using a quasiparticle approach. We then consider the inclusion of non-spheroidal (non-ellipsoidal) corrections to leadingorder anisotropic hydrodynamics and present the findings of the resulting second-order viscous anisotropic hydrodynamics framework. We compare the results obtained in both the conformal and non-conformal cases with exact solutions to the Boltzmann equation and demonstrate that, in all known cases, anisotropic hydrodynamics best reproduces the exact solutions. Based on this success, we then discuss the phenomenological application of anisotropic hydrodynamics. Along these lines, we review techniques which can be used to convert a momentum-space anisotropic fluid into hadronic degrees of freedom by generalizing the original idea of Cooper-Frye freeze-out to momentum-space anisotropic systems. And, finally, we present phenomenological results of 3+1d quasiparticle anisotropic hydrodynamic simulations and compare them to experimental data produced in 2.76 TeV Pb-Pb collisions at the LHC. Our results indicate that anisotropic hydrodynamics provides a promising framework for describing the dynamics of the momentum-space anisotropic QGP created in heavy-ion collisions.

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Anisotropic hydrodynamics for conformal Gubser flow

Cited by 21 publications

References 59 publications

Anisotropic hydrodynamics with a scalar collisional kernel

Anisotropic hydrodynamics with a scalar collisional kernel

Anisotropic hydrodynamic modeling of 200 GeV Au-Au collisions

Relativistic anisotropic hydrodynamics

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