  Systematic comparisons of jetlike correlation data to radiative and
collisional energy loss model calculations are essential to extract transport
properties of the quark-gluon medium created in relativistic heavy ion
collisions. This paper presents a transport study of collisional broadening of
jetlike correlations, by following parton-parton collision history in a
multiphase transport (AMPT) model. The correlation shape is studied as a
function of the number of parton-parton collisions suffered by a high
transverse momentum probe parton ($N_{\rm coll}$) and the azimuth of the probe
relative to the reaction plane ($\phi_{\rm fin.}^{\rm probe}$). Correlation is
found to broaden with increasing $N_{\rm coll}$ and $\phi_{\rm fin.}^{\rm
probe}$ from in- to out-of-plane direction. This study provides a transport
model reference for future jet-medium interaction studies.
