First observation of $Z \to \tau^{+}\tau^{-}$ production in pp collisions with CMS at $\sqrt{s}$ = 7 TeV

Studies of Z bosons decaying to taus constitute a test of the Standard Model in the new energy regime as well as a benchmark process for Higgs searches. This paper describes the first results of Z to tau tau studies performed with $1.7\ \mathrm{pb}^{-1}$ of data collected with CMS detector up to end of Summer 2010.