On the origin of trigger-angle dependence of di-hadron correlations

Abstract

The STAR Collaboration reported measurements of di-hadron azimuthal correlation in medium-central Au+Au collisions at 200 AGeV, where the data are presented as a function of the trigger particle's azimuthal angle relative to the event plane ${\varphi }_s$. In particular, it is observed that the away-side correlation evolves from single- to double-peak structure with increasing ${\varphi }_s$. In this work, we present the calculated correlations as functions of both ${\varphi }_s$ and particle transverse momentum $p_T$, using the hydrodynamic code NeXSPheRIO. The results are found to be in reasonable agreement with the STAR data. We further argue that the above ${\varphi }_s$ dependence of the correlation structure can be understood in terms of one-tube model, as due to an interplay between the background elliptic flow caused by the initial state global geometry and the flow produced by fluctuations.

16 pages, 4 figures

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Cited by in corpus (17)

• Hydrodynamic Predictions for Mixed Harmonic Correlations in 200 GeV Au+Au Collisions
• Study of the sensitivity of observables to hot spot size in heavy ion collisions
• Decomposition of fluctuating initial conditions and flow harmonics
• Novel Phenomena in Particle Correlations in Relativistic Heavy-Ion Collisions
• Event-plane dependent dihadron correlations with harmonic $v_n$ subtraction in Au+Au Collisions at $\sqrt{s_{{}_{\mathrm{NN}}}}=200$ GeV
• $p_T$-Dependent Particle Number Fluctuations From Principal Component Analyses in Hydrodynamic Simulations of Heavy-Ion Collisions
• Two-particle correlations at high-energy nuclear collisions, peripheral-tube model revisited
• Hydrodynamic approach to the centrality dependence of di-hadron correlations
• Relics of Minijets amid Anisotropic Flows in High-energy Heavy-ion Collisions
• Event-plane dependent di-hadron correlations with harmonic $v_n$ subtraction in a hydrodynamic model
• On the peripheral-tube description of the two-particle correlations in nuclear collisions
• Hydrodynamic results on multiplicity fluctuations in heavy-ion collisions
• On statistical fluctuations in collective flows
• A derivation of the entropy-based relativistic smoothed particle hydrodynamics by variational principle
• Centrality and transverse momentum dependence of dihadron correlations in a hydrodynamic model
• On the boundary condition and related instability in the Smoothed Particle Hydrodynamics
• Further results on peripheral-tube model for ridge correlation