Speaker
Dr
Alberica Toia
(Johann-Wolfgang-Goethe Univ. (DE))
Description
Measurements of particle production in proton-nucleus collisions
provide a reference to disentangle final state effects,
i.e. signatures of the formation of a deconfined hot medium, from
initial state effects, already present in cold nuclear matter. While
most of the benchmarks from the control experiment indicate that
initial state effects do not play a role in the observed suppression
of hadron production observed in heavy ion collisions, several
measurements of particle production in the low and intermediate $p_{\rm T}$
region indicate the presence of collective effects.
Since many initial state effects are expected to vary as a function of
the number of collisions suffered by the incoming projectile, it is
crucial to estimate event-by-event the centrality of the collision.
We present the centrality dependence of particle production in p-A
collisions at $\sqrt{s_{\rm NN}}$ = 5.02 TeV measured by the ALICE experiment,
including the pseudo-rapidity and transverse momentum spectra, with a
special emphasis on the event classification in centrality classes and
its implications in the interpretation of the nuclear effects.
| On behalf of collaboration: | ALICE |
|---|
Author
Dr
Alberica Toia
(Johann-Wolfgang-Goethe Univ. (DE))
