Show simple item record

dc.contributor.authorKarasu Uysal, Ayben
dc.contributor.authorALICE, Collaboration
dc.date.accessioned2019-07-05T11:17:11Z
dc.date.available2019-07-05T11:17:11Z
dc.date.issued2014
dc.identifier.urihttps://hdl.handle.net/20.500.12498/496
dc.description.abstractMeasurements of multiparticle azimuthal correlations (cumulants) for charged particles in p-Pb at √sNN = 5.02 TeV and Pb-Pb at √sNN = 2.76 TeV collisions are presented. They help address the question of whether there is evidence for global, flowlike, azimuthal correlations in the p-Pb system. Comparisons are made to measurements from the larger Pb-Pb system, where such evidence is established. In particular, the second harmonic two-particle cumulants are found to decrease with multiplicity, characteristic of a dominance of few-particle correlations in p-Pb collisions. However, when a |�����η| gap is placed to suppress such correlations, the two-particle cumulants begin to rise at high multiplicity, indicating the presence of global azimuthal correlations. The Pb-Pb values are higher than the p-Pb values at similar multiplicities. In both systems, the second harmonic four-particle cumulants exhibit a transition from positive to negative values when the multiplicity increases. The negative values allow for a measurement of v2{4} to be made, which is found to be higher in Pb-Pb collisions at similar multiplicities. The second harmonic six-particle cumulants are also found to be higher in Pb-Pb collisions. In Pb-Pb collisions, we generally find v2{4} ≃ v2{6} ̸= 0 which is indicative of a Bessel-Gaussian function for the v2 distribution. For very high-multiplicity Pb-Pb collisions, we observe that the four- and six-particle cumulants become consistent with 0. Finally, third harmonic two-particle cumulants in p-Pb and Pb-Pb are measured. These are found to be similar for overlapping multiplicities, when a |�����η| > 1.4 gap is placed.en_US
dc.relation10.1103/PhysRevC.90.054901en_US
dc.subjectazimuthal correlations, LHCi, ALICEen_US
dc.titleMultiparticle azimuthal correlations in p-Pb and Pb-Pb collisions at the CERN Large Hadron Collideren_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