  In this article, we report the inclusive charged hadron and isolated photon
spectra at $\sqrt{s_{NN}}=2.76$ TeV PbPb collisions measured with the CMS
detector at LHC. Charged particle momentum spectra are compared to a
constructed reference measurement of proton-proton collisions at
$\sqrt{s}=2.76$ TeV by using a combination of $x_T$ scaling and direct
interpolation at fixed $p_{T}$. Photon results are compared to next to leading
order calculations at the same center of mass energy. Nuclear modification
factors ($R_{AA}$) are calculated to study the properties of the medium. While
a large suppression is observed in the charged particle $R_{AA}$ at high
transverse momentum, isolated photons show no modifications, revealing that
PbPb collisions at $\sqrt{s_{NN}}=2.76$ TeV produce a strongly interacting
colored medium.
