Charged Hadron Spectra Measurement with the CMS detector in pp collisions at s=0.9, 2.36, and 7 TeV

The CMS measurement of the charged hadron pseudorapidity and transverse momentum distributions in minimum bias pp collisions at s=0.9, 2.36 and 7 TeV, is presented. The charged hadron yield results were obtained using the inner silicon tracker, by means of 3 different methods: counting the number of reconstructed hits, the number of hit pairs (tracklet-based algorithm), and the number of fully reconstructed particle tracks. The obtained data is compared with other experiment results, several Monte-Carlo models and tunes, as well as some current theoretical models.