Two-particle correlations in p-Pb collisions at the LHC with ALICE
Abstract
The double ridge structure previously observed in Pb-Pb collisions has also been recently observed in high-multiplicity p-Pb collisions at sqrt(sNN) = 5.02 TeV. These systems show a long-range structure (large separation in Deltaeta) at the near- (Deltaphi ~ 0) and away-side (Deltaphi ~ pi) of the trigger particle. In order to understand the nature of this effect the two-particle correlation analysis has been extended to identified particles. Particles are identified up to transverse momentum pT values of 4 GeV/c using the energy loss signal in the Time Projection Chamber detector, complemented with the information from the Time of Flight detector. This measurement casts a new light on the potential collective (i.e. hydrodynamic) behaviour of particle production in p-Pb collisions.
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