PHENIX first measurement of the J/psi elliptic flow parameter v2 in Au+Au collisions at sqrt(sNN) = 200 GeV

Abstract

Recent results indicate that the J/psi suppression pattern differs with rapidity showing a larger suppression at forward rapidity. J/psi suppression mechanisms based on energy density (such as color screening, interaction with co-movers, etc.) predict the opposite trend. On the other hand, it is expected that more c\bar{c} pairs should be available to form quarkonia at mid-rapidity via recombination. Some models provide a way to differentiate J/psi production from initially produced c\bar{c} pairs and final state recombination of uncorrelated pairs, via the rapidity and transverse momentum dependence of the elliptic flow (v2). During 2007 data taking at RHIC, a large sample of Au+Au collisions at sqrt(sNN)=200 GeV was collected. The statistics has been increased compared to previous 2004 data set, thus allowing a more precise measurement of the J/psi production at both mid and forward rapidity. Furthermore, the PHENIX experiment benefited from the addition of a new detector, which improves the reaction plane resolution and allows us to measure the J/psi v2. Comparing this measurement to the positive D-mesons v2 (through non-photonic electron decays) will help constraining the J/psi production mechanisms and getting a more precise picture of the proportion of J/psi coming from direct production or charm quark coalescence. Details on how the J/psi v2 is measured at both rapidities are presented. The J/psi v2 as a function of transverse momentum are compared to existing models.

4 pages, 3 figures, Quark Matter 2008 proceedings

References in corpus (10)

• J/psi Production vs Centrality, Transverse Momentum, and Rapidity in Au+Au Collisions at sqrt(s_NN) = 200 GeV
• Statistical hadronization of heavy quarks in ultra-relativistic nucleus-nucleus collisions
• J/psi Production in Quark-Gluon Plasma
• Transverse Momentum Spectra of J/ψin Heavy-Ion Collisions
• Quark Coalescence based on a Transport Equation
• Azimuthally sensitive correlations in nucleus-nucleus collisions
• Evidence for non-hadronic interactions of charm degrees of freedom in heavy-ion collisions at relativistic energies
• Measurements of heavy quark production via single leptons at PHENIX
• J/psi production at RHIC-PHENIX
• Measurements of Cold Nuclear Matter Effects on J/psi in the PHENIX Experiment via Deuteron-Gold Collisions

Cited by in corpus (16)

• Heavy-flavour and quarkonium production in the LHC era: from proton-proton to heavy-ion collisions
• J/Psi Elliptic Flow in Pb-Pb Collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• Open and hidden charm in proton-nucleus and heavy-ion collisions
• Deuteron production and elliptic flow in relativistic heavy ion collisions
• J/psi elliptic flow in relativistic heavy ion collisions
• $J/\psi$ production and elliptic flow in relativistic heavy-ion collisions
• Quarkonia Production in Hot and Cold Matters
• J/psi production at RHIC-PHENIX
• Highlights from PHENIX - I
• Impact of Medium Anisotropy on Quarkonium Dissociation and Regeneration
• Anisotropic flow: A case for Bottomonia
• Perspectives in Small Systems : Heavy Quarks and HBT Radii
• $\pi$-$J/\psi$ Correlation and Elliptic Flow Parameter $v_2$ of Charmed Mesons at RHIC Energy
• First Measurement of the J/psi Azimuthal Anisotropy in PHENIX at Forward Rapidity in Au+Au Collisions at sqrt s(NN) = 200 GeV
• Hydrodynamical model for $J/\psi$ suppression and elliptic flow
• Melting of heavy quarkonia in QGP using deep neural networks