  The event generator based on the higher-twist energy loss formalism --
Modular All Twist Transverse-scattering Elastic-drag and Radiation (MATTER) --
is further developed and coupled to a hydrodynamic model for studying jet
modification in relativistic nuclear collisions. The probability of parton
splitting is calculated using the Sudakov form factor that is constructed by a
combination of vacuum and medium-induced splitting functions; and the full
parton showers are simulated, including both energy-momentum and space-time
evolutions of all jet partons. With the assumption that partons below a virtual
scale of 1 GeV is absorbed by the medium, this framework is able to provide a
reasonable description of the nuclear modification of both leading hadrons and
jets at high transverse momentum at the BNL Relativistic Heavy Ion Collider and
the CERN Large Hadron Collider.
