  Photons from the interaction of a highly energetic jet with a thermal medium
are an important contribution to the total photon yield measured in
ultrarelativistic heavy-ion collisions and also an important probe to study the
medium degrees of freedom. Previously this contribution has often been computed
in the context of a leading parton energy loss approximation. In this work,
jet-medium interaction photons are instead estimated using a medium-modified
shower evolution model, where the energy degradation due to vacuum radiation
prior to medium formation, the virtuality evolution of intermediate states and
the photon emission from subleading shower partons is taken into account
consistently. The results indicate that the leading parton energy loss
approximation does not appear to work well for photon emission from jet-medium
interaction.

High Energy Physics - Phenomenology