Speaker
Igor Kozlov
(McGill University)
Description
We perform 3+1D viscous hydrodynamic calculations of proton-nucleus
and nucleus-nucleus collisions. The goal is to ascertain the nature
of the striking correlations seen in recent proton-nucleus collisions.
In particular, one would like to know: is the observed ridge a
signature of collective behavior? Can the highest multiplicity
collision systems be accurately described as a relativistic fluid? If
so, at what point does hydrodynamics fail to describe the bulk
evolution?
To this end, we propose to measure the detailed transverse momentum
structure of two-particle correlations. They must satisfy rigid
inequality relations in any hydrodynamic system, and within those
bounds we show that they should have a particular dependence on
multiplicity over the entire measured centrality range. Any deviation
from this behavior would signal a breakdown of a hydrodynamic
description. We also show how a simultaneous description of Pb-Pb and
p-Pb data can put a significant constraint on theoretical models.
Finally, we compare our calculations to the full set of existing
measurements, demonstrating what parameters are required
for a good fit to data and commenting on what can be learned.
| On behalf of collaboration: | JET |
|---|
Authors
Igor Kozlov
(McGill University)
Matthew Luzum
(McGill / LBNL)
Co-authors
Charles Gale
(McGill University)
Gabriel Denicol
(McGill University)
Sangyong Jeon
(McGill University)
