ϕ production at forward rapidity in pp, p–Pb and Pb–Pb collisions with ALICE

The ALICE experiment at the LHC measured vector meson production in p-Pb collisions at sNN=5.02 TeV , pp and Pb-Pb collisions at sNN=2.76 TeV . In pp collisions, the ϕ differential cross section as a function of p T was measured in the range 1<pT<5 GeV/c and compared with the calculations from PHOJET and PYTHIA. In p-Pb collisions, measurements of the ϕ yield and the nuclear modification factor in the rapidity ranges 2.03<y<3.53 (p-going direction) and −4.46<y<−2.96 (Pb-going direction) are shown. An asymmetry between the cross section at forward and backward rapidity is observed. Results are compared with the predictions provided by commonly used event generators. In Pb-Pb collisions, the ϕ yield and the nuclear modification factor are obtained as a function of centrality in the intermediate p T region (2<pT<5 GeV/c) and for 2.5<y<4 . Differences are observed between these results and those measured in the same p T range at midrapidity in the KK channel.