Measurements of anisotropic flow and flow fluctuations in Xe-Xe and Pb-Pb collisions with ALICE

Margutti J., Acharya S., Acosta F. T., Adamova D., Adolfsson J., Aggarwal M. M., ...More

NUCLEAR PHYSICS A, vol.982, pp.367-370, 2019 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 982
  • Publication Date: 2019
  • Doi Number: 10.1016/j.nuclphysa.2018.11.026
  • Journal Name: NUCLEAR PHYSICS A
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.367-370
  • Keywords: LHC, ALICE, anisotropic flow, flow fluctuations, Pb-Pb, Xe-Xe
  • Bursa Uludag University Affiliated: No


Anisotropic flow is a key observable to characterise the system created in heavy-ion collisions, as it is sensitive to the system's initial state, transport properties, the equation of state and freeze-out conditions. In these proceedings we present the anisotropic flow coefficients of inclusive charged particles in Pb-Pb collisions at root s(NN) = 2.76 and 5.02 TeV, and in Xe-Xe collisions at root s(NN) = 5.44 TeV. The results are reported for a wide range of particle transverse momentum within the pseudo-rapidity range vertical bar eta vertical bar < 0.8 at different collision centralities. The energy and system dependence are found to place strong constraints on the temperature dependence of eta/s and the modeling of the initial state, respectively. We also present detailed studies of flow fluctuations in heavy-ion collisions, in order to precisely characterise the underlying flow probability density function. We find evidence of non-Bessel-Gaussian fluctuations and discuss the origin of this observation.