  Measurements of the transverse momentum spectra of light flavor particles at
intermediate and high pT are an important tool for QCD studies. In pp
collisions they provide a baseline for perturbative QCD, while in Pb-Pb they
are used to investigate the suppression caused by the surrounding medium. In
p-Pb collisions, such measurements provide a reference to disentangle final
from initial state effects and thus play an important role in the search for
signatures of the formation of a deconfined hot medium. While the comparison of
the p-Pb and Pb-Pb data indicates that initial state effects do not play a role
in the suppression of hadron production observed at high pT in heavy ion
collisions, several measurements of particle production in the low and
intermediate pT region indicate the presence of collective effects.
