Forward-central two-particle correlations in p-Pb collisions at sqrt(s_NN)=5.02 TeV

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5.02 TeV
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Two-particle angular correlations between trigger particles in forward pseudorapidity range (2.5 < |eta| < 4.0) and associated particles in the central range (|eta| < 1.0) are reported in p-Pb collisions at a nucleon--nucleon centre-of-mass energy of 5.02 TeV. The trigger particles are reconstructed by the ALICE muon spectrometer, and the associated particles by the ALICE central barrel tracking detectors. In high-multiplicity events, the double-ridge structure, previously discovered in two-particle angular correlations at midrapidity, is found to persist to the pseudorapidity ranges studied here.
The second order Fourier coefficients for muons extracted using the subtraction method have similar transverse momentum (pt) dependence in p-going (p-Pb) and Pb-going (Pb-p) cases, with the Pb-going coefficients larger by about 14% independent of pt. The results are compared with calculations from a hydrodynamical and a parton-cascade model, which both predict stronger pt and eta dependence than the data.