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In this article, we report the inclusive charged hadron and isolated photonspectra at $\sqrt{s_{NN}}=2.76$ TeV PbPb collisions measured with the CMSdetector at LHC. Charged particle momentum spectra are compared to aconstructed reference measurement of proton-proton collisions at$\sqrt{s}=2.76$ TeV by using a combination of $x_T$ scaling and directinterpolation at fixed $p_{T}$. Photon results are compared to next to leadingorder calculations at the same center of mass energy. Nuclear modificationfactors ($R_{AA}$) are calculated to study the properties of the medium. Whilea large suppression is observed in the charged particle $R_{AA}$ at hightransverse momentum, isolated photons show no modifications, revealing thatPbPb collisions at $\sqrt{s_{NN}}=2.76$ TeV produce a strongly interactingcolored medium.

High $p_{T}$ inclusive hadron and photon spectra in pp and PbPb collisions