Measurement of ${\rm Y}(1\mathrm{S})$ elliptic flow at forward rapidity in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV

Abstract

The first measurement of the ${\rm Y}(1\mathrm{S})$ elliptic flow coefficient ($v_2$) is performed at forward rapidity (2.5 $<$ $y$ $<$ 4) in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV with the ALICE detector at the LHC. The results are obtained with the scalar product method and are reported as a function of transverse momentum ($p_{\mathrm{T}}$) up to 15 GeV/$c$ in the 5-60% centrality interval. The measured ${\rm Y}(1\mathrm{S})$ $v_2$ is consistent with zero and with the small positive values predicted by transport models within uncertainties. The $v_2$ coefficient in 2 $<$ $p_{\mathrm{T}}$ $<$ 15 GeV/$c$ is lower than that of inclusive J/$\psi$ mesons in the same $p_{\mathrm{T}}$ interval by 2.6 standard deviations. These results, combined with earlier suppression measurements, are in agreement with a scenario in which the ${\rm Y}$(1S) production in Pb-Pb collisions at LHC energies is dominated by dissociation limited to the early stage of the collision whereas in the J/$\psi$ case there is substantial experimental evidence of an additional regeneration component.

17 pages, 3 captioned figures, authors from page 12, published version, fixed MC predictions in Fig 2, figures at http://alice-publications.web.cern.ch/node/5452

References in corpus (47)

• Viscosity in Strongly Interacting Quantum Field Theories from Black Hole Physics
• Heavy quarkonium: progress, puzzles, and opportunities
• Flow Study in Relativistic Nuclear Collisions by Fourier Expansion of Azimuthal Particle Distributions
• Performance of the ALICE Experiment at the CERN LHC
• Conformal Relativistic Viscous Hydrodynamics: Applications to RHIC results at sqrt(s_NN) = 200 GeV
• Heavy-flavour and quarkonium production in the LHC era: from proton-proton to heavy-ion collisions
• (Non)Thermal Aspects of Charmonium Production and a New Look at J/$\psi$ Suppression
• Performance of the ALICE VZERO system
• Elliptic flow from two- and four-particle correlations in Au + Au collisions at sqrt{s_{NN}} = 130 GeV
• Alignment of the ALICE Inner Tracking System with cosmic-ray tracks
• Properties of hot and dense matter from relativistic heavy ion collisions
• Event-by-event shape and flow fluctuations of relativistic heavy-ion collision fireballs
• Quarkonium Feed-Down and Sequential Suppression
• Mapping the hydrodynamic response to the initial geometry in heavy-ion collisions
• Observation of sequential Upsilon suppression in PbPb collisions
• J/$\psi$ suppression at forward rapidity in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• Centrality dependence of the charged-particle multiplicity density at mid-rapidity in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
• Centrality, rapidity and transverse momentum dependence of $J/\psi$ suppression in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$=2.76 TeV
• Heavy Flavor at the Large Hadron Collider in a Strong Coupling Approach
• Medium Effects on Charmonium Production at ultrarelativistic energies available at the CERN Large Haron Collider
• Observation of Anisotropic Event Shapes and Transverse Flow in Au+Au Collisions at AGS Energy
• Sequential Regeneration of Charmonia in Heavy-Ion Collisions
• J/$\psi$ suppression at forward rapidity in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV
• Color Screening and Regeneration of Bottomonia in High-Energy Heavy-Ion Collisions
• Quarkonia in the Quark Gluon Plasma
• Charged-particle multiplicities in proton-proton collisions at $\sqrt{s}$ = 0.9 to 8 TeV
• D-meson azimuthal anisotropy in mid-central Pb-Pb collisions at $\sqrt{{\mathbf{s}}_{\mathrm{NN}}}=5.02$ TeV
• Suppression of Upsilon(1S), Upsilon(2S), and Upsilon(3S) production in PbPb collisions at sqrt(s[NN]) = 2.76 TeV
• Centrality dependence of the pseudorapidity density distribution for charged particles in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV
• Measurement of prompt D${}^0$ meson azimuthal anisotropy in PbPb collisions at $\sqrt{s_{\mathrm{NN}}}=$5.02 TeV
• J/Psi Elliptic Flow in Pb-Pb Collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• Suppression of ${\rm Y}$(1S) at forward rapidity in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• Effects of non-uniform acceptance in anisotropic flow measurement
• J/$\psi$ elliptic flow in Pb-Pb collisions at $\sqrt{{\mathbf{s}}_{\mathrm{NN}}}$ = 5.02 TeV
• Azimuthally sensitive correlations in nucleus-nucleus collisions
• In-Medium Charmonium Production in Proton-Nucleus Collisions
• Measurement of J/{psi} Azimuthal Anisotropy in Au+Au Collisions at {sqrt{s_{NN}}} = 200 GeV
• Search for collectivity with azimuthal J/$\psi$-hadron correlations in high multiplicity p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 and 8.16 TeV
• Observation of prompt J/$\psi$ meson elliptic flow in high-multiplicity pPb collisions at $\sqrt{s_{\mathrm{NN}}}=$ 8.16 TeV
• On the elliptic flow of heavy quarkonia in $pA$ collisions
• ${\rm Y}$ suppression at forward rapidity in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
• Prompt and non-prompt $J/\psi$ elliptic flow in Pb+Pb collisions at $\sqrt{s_{{}_{\text{NN}}}}=5.02$ TeV with the ATLAS detector
• Event-shape engineering for the D-meson elliptic flow in mid-central Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
• Anisotropic escape mechanism and elliptic flow of bottomonia
• A New Method for the High-Precision Alignment of Track Detectors
• Study of J/$\psi$ azimuthal anisotropy at forward rapidity in Pb-Pb collisions at $\sqrt{{\text{s}}_{\mathrm{NN}}}$ = 5.02 TeV
• Testing charm quark thermalisation within the Statistical Hadronisation Model

Cited by in corpus (33)

• The ALICE experiment: a journey through QCD
• Heavy quarks and jets as probes of the QGP
• Bottomonium production in heavy-ion collisions using quantum trajectories: Differential observables and momentum anisotropy
• Measurement of the azimuthal anisotropy of ${\rm Y}$(1S) and ${\rm Y}$(2S) mesons in PbPb collisions at $\sqrt{s_{\mathrm{NN}}}=$ 5.02 TeV
• Bottomonium suppression and elliptic flow from real-time quantum evolution
• Regeneration of bottomonia in an open quantum systems approach
• ${\rm Y}$ production and nuclear modification at forward rapidity in Pb-Pb collisions at $\sqrt{{\text{s}}_{\text{NN}}}=5.02$ TeV
• Bottomonium suppression and elliptic flow using Heavy Quarkonium Quantum Dynamics
• Elliptic flow of electrons from beauty-hadron decays in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
• QCD Challenges from pp to A-A Collisions
• ${\rm Y}(1S)$ transverse momentum spectra through dissociation and regeneration in heavy ion collisions
• Prospects for quarkonium studies at the high-luminosity LHC
• Blast-wave description of ${\rm Y}$ elliptic flow at energies available at the CERN Large Hadron Collider
• Fireball tomography from bottomonia elliptic flow in relativistic heavy-ion collisions
• Probing charm quark dynamics via multiparticle correlations in PbPb collisions at $\sqrt{s_{\mathrm{NN}}}=$ 5.02 TeV
• The impact of fluctuating initial conditions on bottomonium suppression in 5.02 TeV heavy-ion collisions
• Probing QGP with flow: An experimental overview
• Quarkonium Production in Heavy Ion Collisions: From Open Quantum System to Transport Equation
• Bottomonium suppression at RHIC and LHC in an open quantum system approach
• Bottomonium spectroscopy in the quark-gluon plasma
• Model study on ${\rm Y}(nS)$ modification in small collision systems
• Aspects of relativistic heavy-ion collisions
• "QM19 summary talk": Outlook and future of heavy-ion collisions
• Production of bottomonia states in proton+proton and heavy-ion collisions
• Transverse momentum dependent feed-down fractions for bottomonium production
• Experimental review of the ${\rm Y}(1S,2S,3S)$ physics at $e^{+}{e}^{-}$ colliders and the LHC
• Perspectives in Small Systems : Heavy Quarks and HBT Radii
• Connection between soft and hard probes of small collision systems at RHIC and LHC
• Multiplicity dependence of ${\rm Y}$ production at forward rapidity in pp collisions at $\sqrt{s}$ = 13 TeV
• Overview of Recent ALICE Results
• Quarkonium production: An experimental overview
• Open heavy-flavour production from small to large collision systems with ALICE at the LHC
• Hadronic effects on charmonium elliptic flows in heavy-ion collisions