Measurement of $\varphi$-meson production in Cu$+$Au at $\sqrt{s_{{}_{NN}}}=200$ GeV and U$+$U at $\sqrt{s_{{}_{NN}}}=193$ GeV

Abstract

The PHENIX experiment reports systematic measurements at the Relativistic Heavy Ion Collider of $\varphi$-meson production in asymmetric Cu$+$Au collisions at $\sqrt{s_{{}_{NN}}}$=200 GeV and in U$+$U collisions at $\sqrt{s_{{}_{NN}}}$=193 GeV. Measurements were performed via the $\varphi \to K^{+}{K}^{-}$ decay channel at midrapidity $|\eta |<0.35$. Features of $\varphi$-meson production measured in Cu$+$Cu, Cu$+$Au, Au$+$Au, and U$+$U collisions were found to not depend on the collision geometry, which was expected because the yields are averaged over the azimuthal angle and follow the expected scaling with nuclear-overlap size. The elliptic flow of the $\varphi$ meson in Cu$+$Au, Au$+$Au, and U$+$U collisions scales with second-order-participant eccentricity and the length scale of the nuclear-overlap region (estimated with the number of participating nucleons). At moderate $p_T$, $\varphi$-meson production measured in Cu$+$Au and U$+$U collisions is consistent with coalescence-model predictions, whereas at high $p_T$ the production is in agreement with expectations for in-medium energy loss of parent partons prior to their fragmentation. The elliptic flow for $\varphi$ mesons measured in Cu$+$Au and U$+$U collisions is well described by a (2+1)D viscous-hydrodynamic model with specific-shear viscosity $\eta /s=1/4\pi$.

arXiv comment412 authors from 76 institutions, 16 pages, 12 figures, 9 tables, 2012 data. v2 is version accepted for publication by Physical Review C. HEPdata for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.html

References in corpus (43)

• An Introduction to PYTHIA 8.2
• Experimental and Theoretical Challenges in the Search for the Quark Gluon Plasma: The STAR Collaboration's Critical Assessment of the Evidence from RHIC Collisions
• Formation of dense partonic matter in relativistic nucleus-nucleus collisions at RHIC: Experimental evaluation by the PHENIX collaboration
• Quark Gluon Plasma an Color Glass Condensate at RHIC? The perspective from the BRAHMS experiment
• The PHOBOS Perspective on Discoveries at RHIC
• Glauber Modeling in High Energy Nuclear Collisions
• A Multi-Phase Transport Model for Relativistic Heavy Ion Collisions
• Collective flow and viscosity in relativistic heavy-ion collisions
• Methods for analyzing anisotropic flow in relativistic nuclear collisions
• Parton coalescence and antiproton/pion anomaly at RHIC
• Study of high-pT charged particle suppression in PbPb compared to pp collisions at sqrt(sNN)=2.76 TeV
• Centrality dependence of charged particle production at large transverse momentum in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=2.76$ TeV
• Measurements of Strange Particle Production in $p+p$ Collisions at $\sqrt{s}$= 200 GeV
• Partonic effects on the elliptic flow at relativistic heavy ion collisions
• Scaling behavior at high p_T and the p/pi ratio
• Phobos results on charged particle multiplicity and pseudorapidity distributions in Au+Au, Cu+Cu, d+Au, and p+p collisions at ultra-relativistic energies
• Jet size dependence of single jet suppression in lead-lead collisions at sqrt(s(NN)) = 2.76 TeV with the ATLAS detector at the LHC
• Color reconnection and flow-like patterns in pp collisions
• Measurement of neutral mesons in p+p collisions at sqrt(s) = 200 GeV and scaling properties of hadron production
• Azimuthal collimation of long range rapidity correlations by strong color fields in high multiplicity hadron-hadron collisions
• Elliptic flow for phi mesons and (anti)deuterons in Au+Au collisions at sqrt(s_NN) = 200 GeV
• Proton and Pion Production Relative to the Reaction Plane in Au + Au Collisions at AGS Energies
• Parton Distributions in Nucleons and Nuclei
• Production of phi mesons at mid-rapidity in sqrt(s_NN) = 200 GeV Au+Au collisions at RHIC
• Nuclear modification factors of phi mesons in d+Au, Cu+Cu and Au+Au collisions at sqrt(S_NN)=200 GeV
• Parameterization of Deformed Nuclei for Glauber Modeling in Relativistic Heavy Ion Collisions
• Centrality categorization for R_{p(d)+A} in high-energy collisions
• Centrality and transverse momentum dependence of elliptic flow of multi-strange hadrons and $\varphi$ meson in Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV
• High-pT pi^zero Production with Respect to the Reaction Plane in Au + Au Collisions at sqrt(s_NN) = 200 GeV
• Saturation of azimuthal anisotropy in Au + Au collisions at sqrt(s_NN) = 62 - 200 GeV
• Phi-meson photoproduction from nuclei
• Production of strange particles at intermediate pT at RHIC
• Predictions of elliptic flow and nuclear modification factor from 200 GeV U + U collisions at RHIC
• The PHENIX Forward Silicon Vertex Detector
• Measurements of directed, elliptic, and triangular flow in Cu$+$Au collisions at $\sqrt{s_{{}_{NN}}}=200$ GeV
• Systematic Study of Azimuthal Anisotropy in Cu$+$Cu and Au$+$Au Collisions at $\sqrt{s_{{}_{NN}}}=62.4$ and 200 GeV
• Azimuthal anisotropy of pi^0 and eta mesons in Au+Au collisions at sqrt(s_NN)=200 GeV
• Study of $\varphi$-meson production in $p$$+$Al, $p$$+$Au, $d$$+$Au, and ${}^3$He$+$Au collisions at $\sqrt{s_{{}_{NN}}}=200$ GeV
• Expansion rates at RHIC
• Production of ${\pi }^0$ and $\eta$ mesons in U$+$U collisions at $\sqrt{s_{{}_{NN}}}=192$ GeV
• Overview of recent ALICE results
• Measurements of identified particle anisotropic flow in Cu+Au and U+U collisions by PHENIX experiment
• Characterization and analysis of azimuthally sensitive correlations

Cited by in corpus (5)

• K${}^{\ast }$(892)${}^{\pm }$ resonance production in Pb$-$Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
• System size dependence of the hadronic rescattering effect at energies available at the CERN Large Hadron Collider
• Identified charged-hadron production in $p$$+$Al, ${}^3$He$+$Au, and Cu$+$Au collisions at $\sqrt{s_{{}_{NN}}}=200$ GeV and in U$+$U collisions at $\sqrt{s_{{}_{NN}}}=193$ GeV
• Measurement of f${}_1$(1285) production in pp collisions at $\sqrt{\text{s}}$ = 13 TeV
• Cross sections for inelastic $K$+$\varphi$ scattering