  When an energetic parton traversing the QCD medium, it may suffer multiple
scatterings and lose energy. This jet quenching phenomenon may lead to the
suppression of leading hadron productions as well as medium modifications of
full jet observables in heavy-ion collisions. In this talk we discuss the
nuclear modification factors and yield ratios of identified meson such as
$\eta$, $\rho^0$, $\phi$, $\omega$, and $K^0_{\rm S}$ as well as $\pi$ meson at
large $p_T$ in A+A collisions at the next-to-leading order (NLO) with
high-twist approach of parton energy loss. Then we discuss a newly developed
formalism of combing NLO matrix elements and parton shower (PS) for initial
hard production with parton energy loss in the QGP, and its application in
investigating massive gauge boson ($Z^0$/$W^{\pm}$) tagged jet productions and
$b\bar{b}$ dijet correlations in Pb+Pb at the LHC.

Nuclear Theory;High Energy Physics - Phenomenology