MSSM Higgs boson reconstruction at CMS via $ggH \rightarrow \tau\tau \rightarrow ll\nu\nu\nu\nu$

The associated Higgs production mechanism $gg \rightarrow b\bar{b}H/A$ can be strongly enhanced in the Minimal Supersymmetric Standard Model (MSSM). Regardless of the production mechanism, the decay of a Higgs Boson into a pair of $\tau$- leptons has a very unique topology that allows reconstruction of the invariant mass of the Higgs, using collinear approximation, with well-measured ${\not}{E}_{T} $. Since the $\tau$ can decay to an electron or muon plus ${\not} {E}_{T}$ the presence of two soft b-jets with leptons (or jets, in the case of hadronic $\tau$ decays) and ${\not}{E}_{T}$ can be the signature of new physics. The hermetic calorimeter coverage of the CMS experiment provides the needed ${\not}{E}_{T}$ resolution for this potential discovery channel. In this report we discuss the invariant mass reconstruction efficiencies of CMS for leptonic $gg \rightarrow b\bar{b}H/A \rightarrow \tau^{+}\tau^{-}$ decay at large $tan\beta$, as well as the background from Drell-Yan production.