Influence of initial-state momentum anisotropy on the final-state collectivity in small collision systems

Abstract

A multi-phase transport model is used to understand the origin of long-range collective azimuthal correlations in small-system collisions. To disentangle between collectivity associated with initial-state intrinsic momentum anisotropy and the collectivity arising as a final-state response to the collision geometry, we studied the development of collectivity in 5.02 TeV $p$+Pb collisions with both initial-state and final-state effects included. We find that the initial momentum anisotropy may not be fully isotropized through parton interactions, and the final-state partonic collectivity in general are correlated with both the initial momentum anisotropy and the shape of the collision geometry. The initial momentum anisotropy also influences the event by event fluctuation of collective flow. Therefore the mere evidence of geometry response of the collective flow can not rule out the presence of large contributions from the initial state.

arXiv comment5 pages, 3 figures

References in corpus (40)

• A Multi-Phase Transport Model for Relativistic Heavy Ion Collisions
• Collective flow and viscosity in relativistic heavy-ion collisions
• Observation of Long-Range Near-Side Angular Correlations in Proton-Proton Collisions at the LHC
• Long-range angular correlations on the near and away side in p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
• Observation of long-range near-side angular correlations in proton-lead collisions at the LHC
• Observation of Associated Near-side and Away-side Long-range Correlations in sqrt(s_NN)=5.02 TeV Proton-lead Collisions with the ATLAS Detector
• Creating small circular, elliptical, and triangular droplets of quark-gluon plasma
• Quadrupole Anisotropy in Dihadron Azimuthal Correlations in Central $d$$+$Au Collisions at $\sqrt{s_{{}_{NN}}}$=200 GeV
• Comparison of the Color Glass Condensate to di-hadron correlations in proton-proton and proton-nucleus collisions
• Collective flow in p-Pb and d-Pb collisions at TeV energies
• Evidence for collective multi-particle correlations in pPb collisions
• Heavy Ion Collisions: Achievements and Challenges
• Novel Collective Phenomena in High-Energy Proton-Proton and Proton-Nucleus Collisions
• Elliptic and triangular flow in p+Pb and peripheral Pb+Pb collisions from parton scatterings
• Measurement of long-range angular correlation and quadrupole anisotropy of pions and (anti)protons in central $d$$+$Au collisions at $\sqrt{s_{{}_{NN}}}$=200 GeV
• Initial State Fluctuations and Final State Correlations in Relativistic Heavy-Ion Collisions
• Anisotropic Hydrodynamics: Three lectures
• Torqued fireballs in relativistic heavy-ion collisions
• Revealing long-range multi-particle collectivity in small collision systems via subevent cumulants
• Long-range pseudorapidity dihadron correlations in $d$+Au collisions at $\sqrt{s_{\mathrm{NN}}}=200$ GeV
• Measurement of longitudinal flow de-correlations in Pb+Pb collisions at $\sqrt{s_{\mathrm{NN}}}=2.76$ and 5.02 TeV with the ATLAS detector
• Measurement of multi-particle azimuthal correlations with the subevent cumulant method in $pp$ and $p$+Pb collisions with the ATLAS detector at the LHC
• Flow in AA and pA as an interplay of fluid-like and non-fluid like excitations
• Relative flow fluctuations as a probe of initial state fluctuations
• Long-range azimuthal correlations in proton-proton and proton-nucleus collisions from the incoherent scattering of partons
• Shrinking the Quark Gluon Plasma
• Measurements of multiparticle correlations in $d$$+$Au collisions at 200, 62.4, 39, and 19.6 GeV and $p$$+$Au collisions at 200 GeV and implications for collective behavior
• Event-shape fluctuations and flow correlations in ultra-relativistic heavy-ion collisions
• Importance of initial and final state effects for azimuthal correlations in p+Pb collisions
• Exploring New Small System Geometries in Heavy Ion Collisions
• Correlated long-range mixed-harmonic fluctuations measured in $pp$, $p$+Pb and low-multiplicity Pb+Pb collisions with the ATLAS detector
• Collectivity from interference
• Signatures of $\alpha$ clustering in ultra-relativistic collisions with light nuclei
• Centrality fluctuations in heavy-ion collisions
• Non-Abelian Bremsstrahlung and Azimuthal Asymmetries in High Energy p+A Reactions
• Measurements of directed, elliptic, and triangular flow in Cu$+$Au collisions at $\sqrt{s_{{}_{NN}}}=200$ GeV
• Multiparticle azimuthal cumulants in p+Pb collisions from a multiphase transport model
• Origins of collectivity in small systems
• Survival rate of initial azimuthal anisotropy in a multi-phase transport model
• Rapidity Decorrelation from Hydrodynamic Fluctuations and Initial Fluctuations

Cited by in corpus (12)

• The ALICE experiment: a journey through QCD
• Effect of non-eikonal corrections on azimuthal asymmetries in the Color Glass Condensate
• Jet tomography in heavy ion collisions with deep learning
• System dependence of away-side broadening and $\alpha$-clustering light nuclei structure effect in dihadron azimuthal correlations
• Probing QGP with flow: An experimental overview
• Response relation in Pb-Pb and p-Pb collisions at 5.02 TeV
• Multiparticle azimuthal cumulants from transverse momentum conservation and collective flow
• Measurements of long-range two-particle correlation over a wide pseudorapidity range in p$-$Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV
• Symmetric cumulant $s{c}_{2,4}\left\{4\right\}$ and asymmetric cumulant $a{c}_2\left\{3\right\}$ from transverse momentum conservation and flow
• Testing the collectivity in large and small colliding systems with test particles
• Long-range azimuthal correlations for partially coherent pion emission in proton-proton collisions
• Event-shaped-dependent cumulants in p-Pb collisions at 5.02 TeV