Searches for supersymmetry in hadronic final states with the CMS detector

CMS has searched for new physics in the fully hadronic final state. Because of the large branching fraction into quarks compared to charged leptons, analyses in this channel have generally large acceptances and therefore competitive sensitivities. The result of three independent and complementary analysis strategies are presented. The ''Razor" analysis using 36 pb$^{-1}$ of luminosity and the $\alpha_T$ analysis, updated with 1.1 fb$^{-1}$, make use of different event-shape variables to supress the background. The third analysis searches in the missing transverse energy tail for an excess in 36 pb$^{-1}$ of data above the standard model background expectation modeled by data-driven methods. In the absence of any sign for new physics in the data exclusion contours in the constrained MSSM are derived and cross-section limits are interpreted in the framework of simplified models.