Anisotropic flow of charged particles in Pb-Pb collisions at √sNN =5.02 TeV

Article, Preprint English OPEN
Adam, Jaroslav ; Adamová, Dagmar ; Aggarwal, Madan M. ; Aglieri Rinella, Gianluca ; Agnello, Michelangelo ; Agrawal, Nikita ; Ahammed, Zubayer ; Ahn, Sang Un ; Aiola, Salvatore ; Akindinov, Alexander ; Alme, Johan ; Hetland, Kristin Fanebust ; Helstrup, Håvard ; Kileng, Bjarte ; Altinpinar, Sedat ; Djuvsland, Øystein ; Haaland, Øystein Senneset ; Lønne, Per-Ivar ; Nystrand, Joakim ; Rehman, Attiq ur ; Røhrich, Dieter ; Tambave, Ganesh Jagannath ; Ullaland, Kjetil ; Velure, Arild ; Wagner, Boris ; Zhang, Hui ; Zhou, Zhuo ; Zhu, Hongsheng ; Arsene, Ionut Christian ; Bätzing, Paul Christoph ... view all 50 authors (2016)
  • Publisher: American Physical Society
  • Journal: (issn: 1092-0145 1079-7114 0031-9007)
  • Related identifiers: doi: 10.1103/PhysRevLett.116.132302/apsxml, doi: 10.1103/PhysRevLett.116.132302
  • Subject: transverse momentum | /dk/atira/pure/researchoutput/pubmedpublicationtype/D013486 | /dk/atira/pure/researchoutput/pubmedpublicationtype/D013485 | elliptic flow | Collective flow | plasma [quark gluon] | ALICE | gap [rapidity] | ALICE; LHC; flow; 5.02 TeV | Research Support, Non-U.S. Gov't | Physics and Astronomy (all) | High Energy Physics - Experiment | CERN LHC Coll | hydrodynamics [model] | 5020 GeV/nucleon | flow [charged particle] | scattering [heavy ion] | triangulation | /dk/atira/pure/researchoutput/pubmedpublicationtype/D016428 | two-particle [correlation] | /dk/atira/pure/publication/pubmedpublicationtype/D013486 | /dk/atira/pure/publication/pubmedpublicationtype/D013485 | lead | Techniques Hydrodynamic models | viscosity | :Matematikk og naturvitenskap: 400::Fysikk: 430::Kjerne- og elementærpartikkelfysikk: 431 [VDP] | :Mathematics and natural scienses: 400::Physics: 430::Nuclear and elementary particle physics: 431 [VDP] | density: ratio [entropy] | Medicine (all) | Research Support, U.S. Gov't, Non-P.H.S. | temperature dependence | anisotropy [flow] | Journal Article | /dk/atira/pure/publication/pubmedpublicationtype/D016428 | Relativistic heavy-ion collisions
    • ddc: ddc:550
    arxiv: Nuclear Experiment | High Energy Physics::Experiment

We report the first results of elliptic ($v_2$), triangular ($v_3$) and quadrangular flow ($v_4$) of charged particles in Pb-Pb collisions at $\sqrt{s_{\rm NN}}=5.02$ TeV with the ALICE detector at the CERN Large Hadron Collider. The measurements are performed in the central pseudorapidity region $|\eta|<0.8$ and for the transverse momentum range $0.2<p_{\rm T}<5$ GeV/$c$. The anisotropic flow is measured using two-particle correlations with a pseudorapidity gap greater than one unit and with the multi-particle cumulant method. Compared to results from Pb-Pb collisions at $\sqrt{s_{\rm NN}}=2.76$ TeV, the anisotropic flow coefficients $v_{2}$, $v_{3}$ and $v_{4}$ are found to increase by ($3.0\pm0.6$)%, ($4.3\pm1.4$)% and ($10.2\pm3.8$)%, respectively, in the centrality range 0-50%. This increase can be attributed mostly to an increase of the average transverse momentum between the two energies. The measurements are found to be compatible with hydrodynamic model calculations. This comparison provides a unique opportunity to test the validity of the hydrodynamic picture and the power to further discriminate between various possibilities for the temperature dependence of shear viscosity to entropy density ratio of the produced matter in heavy-ion collisions at the highest energies.