Speaker
Lukasz Kamil Graczykowski
(Warsaw University of Technology (PL))
Description
The size of the particle emitting region at freeze-out obtained with
femtoscopy is an important characteristic of heavy-ion collisions.
Such a measurement for identical pions (sometimes called "HBT") provides
a detailed picture of the system size and its dependence on pair
transverse momentum and multiplicity.
The A-A pion femtoscopy results are interpreted in the hydrodynamic
framework as a signature of significant collective radial flow.
The pp data could not be described in the same framework. It is of
great interest how the p-A system would behave as compared to the pp
and A-A results. In particular models based on hydrodynamics and
calculations involving gluon saturation provide predictions for the
system size in p-A collisions. A careful comparison of the radii
measured in pp and p-A collisions is needed to verify those predictions.
We present the pion femtoscopy results in p-Pb collisions at the LHC
with ALICE. The analysis was performed in three dimensions using both
standard Cartesian and Spherical Harmonics representations of the
correlation function. The extracted femtoscopic radii are compared to
the high multiplicity ALICE pp results as well as to model predictions.
| On behalf of collaboration: | ALICE |
|---|
Primary author
Lukasz Kamil Graczykowski
(Warsaw University of Technology (PL))
