## Abstract

Measurements of anisotropic flow coefficients with two- and multi-particle cumulants for inclusive charged particles in Pb-Pb collisions at sNN=5.02 and 2.76 TeV are reported in the pseudorapidity range |η| < 0.8 and transverse momentum 0.2 < p_{T} < 50 GeV/c. The full data sample collected by the ALICE detector in 2015 (2010), corresponding to an integrated luminosity of 12.7 (2.0) μb^{−1} in the centrality range 0-80%, is analysed. Flow coefficients up to the sixth flow harmonic (v_{6}) are reported and a detailed comparison among results at the two energies is carried out. The p_{T} dependence of anisotropic flow coefficients and its evolution with respect to centrality and harmonic number n are investigated. An approximate power-law scaling of the form v_{n}(p_{T}) ∼ p_{T} ^{n/3} is observed for all flow harmonics at low p_{T} (0.2 < p_{T} < 3 GeV/c). At the same time, the ratios v_{n}/v_{m} ^{n/ m} are observed to be essentially independent of p_{T} for most centralities up to about p_{T} = 10 GeV/c. Analysing the differences among higher-order cumulants of elliptic flow (v_{2}), which have different sensitivities to flow fluctuations, a measurement of the standardised skewness of the event-by-event v_{2} distribution P(v_{2}) is reported and constraints on its higher moments are provided. The Elliptic Power distribution is used to parametrise P(v_{2}), extracting its parameters from fits to cumulants. The measurements are compared to different model predictions in order to discriminate among initial-state models and to constrain the temperature dependence of the shear viscosity to entropy-density ratio.[Figure not available: see fulltext.].

Original language | English |
---|---|

Article number | 103 |

Journal | Journal of High Energy Physics |

Volume | 2018 |

Issue number | 7 |

DOIs | |

Publication status | Published - 2018 Jul 1 |

### Bibliographical note

Publisher Copyright:© 2018, The Author(s).

## All Science Journal Classification (ASJC) codes

- Nuclear and High Energy Physics