Long range angular correlations in p-Pb collisions with ALICE

Measurements of particle correlations as a function of relative azimuthal angle
and relative (pseudo)rapidity are very useful for investigating underlying particle
production mechanisms in high-energy nucleus-nucleus collisions. Long range correlations on the near side have been observed in high multiplicity pp and p-Pb collisions
at the LHC and RHIC energies. Possible explanations of the long range correlations
in high multiplicity pp and p-Pb collisions are the collective behavior of the created
medium and/or the remnants of the strong initial state effects such as gluon saturation.
The saturation effects are expected to be enhanced at forward rapidity and
measurements of the particle production with large rapidity gaps and its centrality
dependence are important to disentangle the initial and final state effects. We will
present an analysis of angular correlations between charged particle tracks in the
ALICE central barrel tracking detectors at -0.8<η <0.8 and energy deposition in
the ALICE forward detectors (FMD) at −3.4 < η < −1.7 in the backward region
and at 1.7<η <5.0 in the forward region.