Show simple item record

dc.contributor.authorKarasu Uysal, Ayben
dc.contributor.authorALICE, Collaboration
dc.date.accessioned2019-07-08T07:44:40Z
dc.date.available2019-07-08T07:44:40Z
dc.date.issued2016
dc.identifier.urihttps://hdl.handle.net/20.500.12498/594
dc.description.abstractThe elliptic, triangular, quadrangular and pentagonal anisotropic flow coeffi- cients for π±, K± and p+p in Pb-Pb collisions at √sNN = 2.76 TeV were measured with the ALICE detector at the Large Hadron Collider. The results were obtained with the Scalar Product method, correlating the identified hadrons with reference particles from a different pseudorapidity region. Effects not related to the common event symmetry planes (non-flow) were estimated using correlations in pp collisions and were subtracted from the measure- ment. The obtained flow coefficients exhibit a clear mass ordering for transverse momen- tum (pT) values below ≈ 3GeV/c. In the intermediate pT region (3 < pT < 6GeV/c), particles group at an approximate level according to the number of constituent quarks, suggesting that coalescence might be the relevant particle production mechanism in this region. The results for pT < 3 GeV/c are described fairly well by a hydrodynamical model (iEBE-VISHNU) that uses initial conditions generated by A Multi-Phase Transport model (AMPT) and describes the expansion of the fireball using a value of 0.08 for the ratio of shear viscosity to entropy density (η/s), coupled to a hadronic cascade model (UrQMD). Finally, expectations from AMPT alone fail to quantitatively describe the measurements for all harmonics throughout the measured transverse momentum region. However, the comparison to the AMPT model highlights the importance of the late hadronic rescatter- ing stage to the development of the observed mass ordering at low values of pT and of coalescence as a particle production mechanism for the particle type grouping at intermediate values of pT for all harmonics.en_US
dc.relation10.1007/JHEP09(2016)164en_US
dc.subjectHadron-Hadron scattering (experiments)en_US
dc.titleHigher harmonic flow coefficients of identified hadrons in Pb-Pb collisions at √sNN = 2.76 TeVen_US
dc.typeArticleen_US
eperson.orcidid0000-0001-6297-2532en_US


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record