Non-linear flow modes of identified particles in Pb-Pb collisions at √sNN = 5.02 TeV
ALICE collaboration. (2020). Non-linear flow modes of identified particles in Pb-Pb collisions at √sNN = 5.02 TeV. Journal of High Energy Physics, 2020(6), Article 147. https://doi.org/10.1007/JHEP06(2020)147
Published in
Journal of High Energy PhysicsAuthors
Date
2020Discipline
Ydin- ja kiihdytinfysiikan huippuyksikköFysiikkaCentre of Excellence in Nuclear and Accelerator Based PhysicsPhysicsCopyright
© CERN, for the benefit of the ALICE Collaboration.
Article funded by SCOAP3
The pT-differential non-linear flow modes, v4,22, v5,32, v6,33 and v6,222 for π±, K±, K0S , p + p¯¯¯, Λ + Λ¯¯¯¯ and ϕ-meson have been measured for the first time at sNN−−−√ = 5.02 TeV in Pb-Pb collisions with the ALICE detector at the Large Hadron Collider. The results were obtained with a multi-particle technique, correlating the identified hadrons with reference charged particles from a different pseudorapidity region. These non-linear observables probe the contribution from the second and third order initial spatial anisotropy coefficients to higher flow harmonics. All the characteristic features observed in previous pT-differential anisotropic flow measurements for various particle species are also present in the non-linear flow modes, i.e. increase of magnitude with increasing centrality percentile, mass ordering at low pT and particle type grouping in the intermediate pT range. Hydrodynamical calculations (iEBE-VISHNU) that use different initial conditions and values of shear and bulk viscosity to entropy density ratios are confronted with the data at low transverse momenta. These calculations exhibit a better agreement with the anisotropic flow coefficients than the non-linear flow modes. These observations indicate that non-linear flow modes can provide additional discriminatory power in the study of initial conditions as well as new stringent constraints to hydrodynamical calculations.
...


Publisher
SpringerISSN Search the Publication Forum
1126-6708Keywords
Publication in research information system
https://converis.jyu.fi/converis/portal/detail/Publication/36058501
Metadata
Show full item recordCollections
License
Related items
Showing items with similar title or keywords.
-
Linear and non-linear flow mode in Pb–Pb collisions at √sNN = 2.76 TeV
ALICE Collaboration (Elsevier B.V., 2017)The second and the third order anisotropic flow, V2 and V3, are mostly determined by the corresponding initial spatial anisotropy coefficients, ε2 and ε3, in the initial density distribution. In addition to their dependence ... -
Elliptic flow of identified hadrons in Pb-Pb collisions at √sNN = 2.76 TeV
ALICE Collaboration (Springer, 2015)The elliptic flow coefficient (v2) of identified particles in Pb-Pb collisions at √ sNN = 2.76 TeV was measured with the ALICE detector at the Large Hadron Collider (LHC). The results were obtained with the Scalar Product ... -
Insight into particle production mechanisms via angular correlations of identified particles in pp collisions at s√=7 TeV
ALICE Collaboration; Chang, BeomSu; Kim, Dong Jo; Rak, Jan; Räsänen, Sami; Slupecki, Maciej; Snellman, Tomas; Trzaska, Wladyslaw; Vargyas, Márton; Viinikainen, Jussi (Springer, 2017)Two-particle angular correlations were measured in pp collisions at s√=7 TeV for pions, kaons, protons, and lambdas, for all particle/anti-particle combinations in the pair. Data for mesons exhibit an expected peak dominated ... -
Z-boson production in p-Pb collisions at √sNN = 8.16 TeV and Pb-Pb collisions at √sNN = 5.02 TeV
ALICE collaboration (Springer, 2020)Measurement of Z-boson production in p-Pb collisions at √sNN = 8.16 TeV and Pb-Pb collisions at √sNN = 5.02 TeV is reported. It is performed in the dimuon decay channel, through the detection of muons with pseudorapidity ... -
Higher harmonic non-linear flow modes of charged hadrons in Pb-Pb collisions at √sNN = 5.02 TeV
ALICE collaboration (Springer, 2020)Anisotropic flow coefficients, vn, non-linear flow mode coefficients, χn,mk, and correlations among different symmetry planes, ρn,mk are measured in Pb-Pb collisions at √sNN = 5.02 TeV. Results obtained with multi-particle ...