Speaker
Ali Hanks
Description
Suppression of high $p_{T}$ hadrons in heavy ion collisions is a
well-known phenomenon, understood to be a result of in-medium energy
loss of partons. To explore more precisely the underlying energy
loss mechanism, PHENIX has measured many complementary observables.
Fractional energy loss of single hadrons vs the number of
participants in Au$+$Au and Cu$+$Cu collisions reveal scaling laws
which can constrain models. Back-to-back correlations between
direct photons and hadrons provide access to the initial parton
energy prior to in-medium interactions. Two-particle correlations
with an azimuthal angle selection of the trigger particle with
respect to the reaction plane can control for the parton path length
inside the medium. Comparing near-side to away-side correlations in
$d$$+$Au collisions to those in $p$$+$$p$ collisions provides a
precise measurement of possible cold nuclear matter effects or other
phenomena not yet accounted for. Recent results from PHENIX on
high-$p_{T}$ particle correlations will be presented.
| On behalf of collaboration: | PHENIX |
|---|
Primary author
Ali Hanks
