Event-plane decorrelation over pseudorapidity and its effect on azimuthal anisotropy measurements in relativistic heavy-ion collisions

Xiao, Kai; Liu, Feng; Wang, Fuqiang

doi:10.1103/physrevc.87.011901

Cited by 55 publications

(37 citation statements)

References 24 publications

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“…In fact, Φ * F 3 and Φ * B 3 are nearly out-of-phase for events selected with small ǫ 3 (the lower 30% of events). This large twist is the dominating source of the decorrelation of triangular flow observed in previous studies [31,49].…”

Section: Simulation With the Ampt Modelmentioning

confidence: 78%

Forward-backward eccentricity and participant-plane angle fluctuations and their influences on longitudinal dynamics of collective flow

Jia

Huo

2014

Phys. Rev. C

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We argue that the transverse shape of the fireball created in heavy ion collision could be strongly influenced by event-by-event fluctuations of the eccentricity vectors for the forward-going and backward-going wounded nucleons: ⃗ ǫn . Due to the asymmetric energy deposition of each wounded nucleon along its direction of motion, the eccentricity vector of the produced fireball is expected to interpolate between ⃗ ǫ F n and ⃗ ǫ B n along the pseudorapidity, and hence exhibits sizable forward-backward(FB) asymmetry (ǫ B n ≠ ǫ F n ) and/or FB-twist (Φ * F n ≠ Φ * B n ). A transport model calculation shows that these initial state longitudinal fluctuations for n = 2 and 3 survive the collective expansion, and result in similar FB asymmetry and/or a twist in the final state event-plane angles. These novel EbyE longitudinal flow fluctuations should be accessible at RHIC and the LHC using the event-shape selection technique proposed in earlier papers. If these effects are observed experimentally, it could improve our understanding of the initial state fluctuations, particle production and collective expansion dynamics of the heavy ion collision.

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Section: Simulation With the Ampt Modelmentioning

confidence: 78%

Forward-backward eccentricity and participant-plane angle fluctuations and their influences on longitudinal dynamics of collective flow

Jia

Huo

2014

Phys. Rev. C

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“…[34]. Reference [35] also describes the decorrelation of flow with increasing pseudorapidity gap using the AMPT model. Figure 9 also is reminiscent of the well known near-side ridge in a plot of η vs. φ having a peak and shoulder [18].…”

Section: η Dependencementioning

confidence: 99%

Third harmonic flow of charged particles in Au+Au collisions atsNN=200 GeV

Adamczyk¹,

Adkins²,

Agakishiev³

et al. 2013

Phys. Rev. C

131

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We report measurements of the third harmonic coefficient of the azimuthal anisotropy, v 3 , known as triangular flow. The analysis is for charged particles in Au + Au collisions at √ s NN = 200 GeV, based on data from the STAR experiment at the BNL Relativistic Heavy Ion Collider. Two-particle correlations as a function of their pseudorapidity separation are fit with narrow and wide Gaussians. Measurements of triangular flow are extracted from the wide Gaussian, from two-particle cumulants with a pseudorapidity gap, and also from event plane analysis methods with a large pseudorapidity gap between the particles and the event plane. These results are 014904-2 THIRD HARMONIC FLOW OF CHARGED PARTICLES IN . . . 88, 014904 (2013) reported as a function of transverse momentum and centrality. A large dependence on the pseudorapidity gap is found. Results are compared with other experiments and model calculations. PHYSICAL REVIEW C

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“…Only at midrapidity, v 1 is zero for smooth nuclei. In fact, for exactly the same reason, other odd harmonics (such as v 3 ) should have been realized to be non-zero as well, even with smooth nuclei [58].…”

Section: Anisotropic Flow Correlationsmentioning

confidence: 97%

“…Moreover, it was shown that even pure hydrodynamic two-particle cumulant flow may not be factorizable [94]. The harmonic symmetry planes can be decorrelated over η [58,95,96]; the event planes do not have to be the same at different η's. This is understandable, perhaps should be expected, if geometry fluctuation plays an important role in generating final-state particle anisotropy.…”

Section: Anisotropic Flow Correlationsmentioning

confidence: 99%

“…This is understandable, perhaps should be expected, if geometry fluctuation plays an important role in generating final-state particle anisotropy. Even with smooth geometry (no fluctuations), the v 3 event planes can be out-of-phase between forward and backward rapidities [58]. Furthermore, event-by-event hydrodynamic calculations suggest that symmetry planes depend on particle p T even at the same η [97].…”

Section: Anisotropic Flow Correlationsmentioning

confidence: 99%

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Jet-quenching and correlations

Wang

2015

Pramana - J Phys

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This article reviews recent advances in our understanding of the experimental aspects of jet-quenching and correlations in relativistic heavy-ion collisions at RHIC and LHC. Emphasis is put on correlation measurements, namely jet-like correlations with anisotropic flow subtraction in heavy-ion collisions and long-range pseudorapidity correlations in small systems. Future path on correlation studies is envisioned which may elucidate jet-medium interactions and the properties of the hot dense medium in QCD.

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Event-plane decorrelation over pseudorapidity and its effect on azimuthal anisotropy measurements in relativistic heavy-ion collisions

Cited by 55 publications

References 24 publications

Forward-backward eccentricity and participant-plane angle fluctuations and their influences on longitudinal dynamics of collective flow

Forward-backward eccentricity and participant-plane angle fluctuations and their influences on longitudinal dynamics of collective flow

Third harmonic flow of charged particles in Au+Au collisions atsNN=200 GeV

Jet-quenching and correlations

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