  Recent measurements of two-particle correlations in high-multiplicity p-Pb
collisions at $\sqrt{s_{NN}} = 5.02$ TeV revealed a long-range structure (large
separation in $\Delta\eta$) at the near- ($\Delta\varphi\simeq0$) and away-side
($\Delta\varphi\simeq\pi$) of the trigger particle. At LHC energies, these
ridge-like structures have not only been observed in Pb-Pb collisions, but also
in high-multiplicity pp collisions. In the first case, this phenomenon is
commonly related to collectivity in hadron production, i.e. hydrodynamic
evolution, whereas in the latter, mechanisms like longitudinal color
connections and multi-parton interactions might play an important role. To shed
light on the particle production mechanisms in p-Pb and Pb-Pb collisions and
answer the question about collectivity, we extend the two-particle correlation
analysis for hadrons in two directions: identified particles, which should show
a characteristic pattern in case of collective motion in a hydrodynamic medium,
and charge-dependent correlations studied with the balance function, which are
sensitive to charge-dependent effects like local charge conservation.
