  We present direct photon-hadron correlations in 200 GeV/A Au$+$Au, $d$$+$Au
and $p$$+$$p$ collisions, for direct photon $p_T$ from 5--12 GeV/$c$, collected
by the PHENIX Collaboration in the years from 2006 to 2011. We observe no
significant modification of jet fragmentation in $d$$+$Au collisions,
indicating that cold nuclear matter effects are small or absent. Hadrons
carrying a large fraction of the quark's momentum are suppressed in Au$+$Au
compared to $p$$+$$p$ and $d$$+$Au. As the momentum fraction decreases, the
yield of hadrons in Au$+$Au increases to an excess over the yield in $p$$+$$p$
collisions. The excess is at large angles and at low hadron $p_T$ and is most
pronounced for hadrons associated with lower momentum direct photons.
Comparison to theoretical calculations suggests that the hadron excess arises
from medium response to energy deposited by jets.

High Energy Physics - Experiment;Nuclear Experiment