Vorticity in heavy-ion collisions

Deng, Wei-Tian; Huang, Xu-Guang

doi:10.1103/physrevc.93.064907

Cited by 216 publications

(181 citation statements)

References 121 publications

(190 reference statements)

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“…[11] is inversely proportional to the collision energy. On the other hand, simulating results by a multi-phase transport (AMPT) model has shown that the averaged classical vorticity decreases with the collision energy [36,37], which, of course, leads to the decline of global polarization. It is also interesting to take a glance on the time evolution of polarization, shown in Fig.…”

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confidence: 99%

Global Λ polarization in high energy collisions

2017

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With a Yang-Mills flux-tube initial state and a high-resolution (3+1)D particle-in-cell relativistic (PICR) hydrodynamics simulation, we calculate the polarization for different energies. The origination of polarization in high energy collisions is discussed, and we find linear impact parameter dependence of the global polarization. Furthermore, the global polarization in our model decreases very quickly in the low energy domain, and the decline curve fits well the recent results of Beam Energy Scan (BES) program launched by the STAR Collaboration at the Relativistic Heavy Ion Collider (RHIC). The time evolution of polarization is also discussed.

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confidence: 99%

Global Λ polarization in high energy collisions

2017

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“…More results can be found in Ref. [7]. Our study may be useful to the numerical simulation of the CVE, the CVW, and the Λ baryon spin polarization.…”

Section: Discussionmentioning

confidence: 94%

“…Recently, it was realized that noncentral heavy-ion collisions can also generate finite flow voriticty and thus provide us with a chance to study quark-gluon matter under local rotation [4,5,6,7]. The mechanism of the generation of finite vorticity is simple.…”

Section: Introductionmentioning

confidence: 99%

“…The parameters are given in Refs. [7]. Once the specific definition of the velocity field is given in numerical setup, the vorticity is calculated according to…”

Section: Numerical Setupsmentioning

confidence: 99%

“…In hydrodynamics, the vorticity represents the local angular velocity, and its existence in heavy-ion collisions may induce a number of intriguing phenomena, for example, the chiral vortical effect (CVE) [8], the chiral vortical wave (CVW) [9], and the global polarization of quarks and Λ baryons [10,11,12,13,14,15]. We present detailed numerical study of the event-by-event generation of vorticity in heavy-ion collisions by using the HIJING event generator [7].…”

Section: Introductionmentioning

confidence: 99%

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Event-by-event generation of vorticity in heavy-ion collisions

Deng

Huang

2017

J. Phys.: Conf. Ser.

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Abstract. In a noncentral heavy-ion collision, the two colliding nuclei have a finite angular momentum in the direction perpendicular to the reaction plane. After the collision, a fraction of the total angular momentum is retained in the produced hot quark-gluon matter and is manifested in the form of fluid shear. Such fluid shear creates finite flow vorticity. We study some features of such generated vorticity, including its strength, beam energy dependence, centrality dependence, and spatial distribution. IntroductionRelativistic heavy-ion collisions provide us with the environments in which we can study the strongly interacting matter under unusual conditions, like extremely high temperature [1] and extremely strong magnetic field [2,3]. Recently, it was realized that noncentral heavy-ion collisions can also generate finite flow voriticty and thus provide us with a chance to study quark-gluon matter under local rotation [4,5,6,7]. The mechanism of the generation of finite vorticity is simple. In a noncentral heavyion collision, the two colliding nuclei have a finite angular momentum in the direction perpendicular to the reaction plane, J 0 ∼ Ab √ s NN /2, with A the number of nucleons in one nucleus, b the impact parameter, and √ s NN the center-of-mass energy of a pair of colliding nucleons. After the collision, a fraction of the total angular momentum is retained in the produced partonic matter which we will call the quark-gluon plasma (QGP). This fraction of angular momentum manifests itself as a shear of the longitudinal momentum density and thus nonzero local vorticity arises. In hydrodynamics, the vorticity represents the local angular velocity, and its existence in heavy-ion collisions may induce a number of intriguing phenomena, for example, the chiral vortical effect (CVE) [8], the chiral vortical wave (CVW) [9], and the global polarization of quarks and Λ baryons [10,11,12,13,14,15].

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Rotation of the QCD Plasma and the Chiral Vortical Effect

Shi

2019

Soft and Hard Probes of QCD Topological Structures in Relativistic Heavy-Ion Collisions

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Vorticity in heavy-ion collisions

Cited by 216 publications

References 121 publications

Global Λ polarization in high energy collisions

Global Λ polarization in high energy collisions

Event-by-event generation of vorticity in heavy-ion collisions

Rotation of the QCD Plasma and the Chiral Vortical Effect

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