Beam energy and system dependence of rapidity-even dipolar flow

Abstract

New measurements of rapidity-even dipolar flow, v${}_1^{even}$, are presented for several transverse momenta, $p_T$, and centrality intervals in Au+Au collisions at $\sqrt{s_{NN}}=200,39$ and $19.6$ GeV, U+U collisions at $\sqrt{s_{NN}}=193$ GeV, and Cu+Au, Cu+Cu, d+Au and p+Au collisions at $\sqrt{s_{NN}}=200$~GeV. The v${}_1^{even}$ shows characteristic dependencies on $p_T$, centrality, collision system and $\sqrt{s_{{}_{NN}}}$, consistent with the expectation from a hydrodynamic-like expansion to the dipolar fluctuation in the initial state. These measurements could serve as constraints to distinguish between different initial-state models, and aid a more reliable extraction of the specific viscosity $\eta /s$.

References in corpus (3)

• Anisotropic flow in sqrt(s)=2.76 TeV Pb+Pb collisions at the LHC
• Directed flow at midrapidity in sqrt(s_NN)=2.76 TeV Pb+Pb collisions
• A study of the anisotropy associated with dipole asymmetry in heavy ion collisions

Cited by in corpus (3)

• Beam-energy dependence of the azimuthal anisotropic flow from RHIC
• Measuring differential particle correlations in relativistic nuclear collisions
• Exploring Rapidity-Even Dipolar Flow in Isobaric Collisions at RHIC