Directed flow at midrapidity in heavy-ion collisions
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It was recently shown that fluctuations in the initial geometry of a heavy ion collision generally result in a dipole asymmetry of the distribution of outgoing particles. This asymmetry, unlike the usual directed flow, is expected to be present at a wide range of rapidity -- including midrapidity. First evidence of this phenomenon can be seen in recent two-particle correlation data by STAR, providing the last element necessary to quantitatively describe long-range dihadron correlations. We extract differential directed flow from these data and propose a new direct measurement.
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Forward citations
Cited by 3 Pith papers
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Rapidity-even directed flow splitting of protons and antiprotons as a probe of baryon stopping in relativistic heavy-ion collisions
The mid-rapidity curvature of Δv₁^even(p − p̄) is proposed as a robust discriminator of initial-state baryon rapidity profiles motivated by double-junction stopping.
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Nonflow Subtraction Beyond Two-Particle Correlations
A nonflow subtraction framework for m-particle cumulants is developed and tested in HIJING simulations for O+O and d+Au collisions.
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Sensitivity of Heavy-Quark Dipolar Flow to its Initial Spatial Distributions in Cu+Au Collisions
In Cu+Au collisions, heavy-quark directed flow is an order of magnitude larger than charged-hadron flow and shows strong sensitivity to initial spatial distributions and temperature-dependent drag.
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