phi meson measurements provide insight into strangeness production, which is one of
the key observables for the hot medium formed in high-energy heavy-ion
collisions. ALICE measured phi production through its decay
in muon pairs in Pb-Pb collisions at SQRT(S_NN) = 2.76 TeV
in the intermediate transverse momentum range 2 < PT < 5 GeV/c
and in the rapidity interval 2.5 < y <4.
The phi yield was measured as a function of the transverse momentum and collision centrality.
The nuclear modification factor was obtained as a
function of the average number of participating nucleons.
Results were compared with the ones obtained via the kaon decay channel in the same
PT range at midrapidity. The values of the nuclear modification factor in the two rapidity
regions are in agreement within uncertainties.