$Z\rightarrow\tau\tau$ production at CMS

The first measurement of the $Z\rightarrow\tau\tau$ cross-section in the $\tau_{\mu}\tau_{had}$, $\tau_e\tau_{had}$, $\tau_e\tau_{\mu}$ and $\tau_{\mu}\tau_{\mu}$ final states is presented. The data collected in 2010 with the CMS detector from proton-proton collisions at $\sqrt{s}$ = 7 TeV are used, corresponding to an integrated luminosity of about 36 pb$^{-1}$. The cross section has been measured to be in good agreement with the next-to-next-to-leading order EWK prediction.The production of Z bosons decaying into tau pairs serves as an important benchmark for tau reconstruction and constitutes a reference Standard Model process for searches at the LHC, like the MSSM $H\rightarrow\tau\tau$.