Sreach for Higgs Pair Production in $bb\tau\tau$ Channel at 8TeV Center of Mass energy by the ALTAS Detector at the LHC.

We present the result of Higgs boson pair production and subsequent decay into the $bb\tau\tau$ channel in $pp$ collision at centre-of-mass energy of 8 TeV using the ATLAS detector at the LHC. This analysis is based on the full 2012 data corresponding to a total luminosity of 20.3 $\textrm{fb}^{-1}$. We have explored resonant and non-resonant production of Higgs pair in the final state where one $\tau$ decays leptonically and the other hadronically. The observed upper limit at 95\% CL on the cross-section $\sigma$ ($gg\to hh$) is found to be 1.6 pb for non-resonant production. For resonant production the observed limit ranges between 4.2 pb for $m_{H}=260$ GeV and 0.46 pb for $m_{H}=1000$~GeV. $H$ is the heavy scalar, which decays to two Standard-Model-like Higgs, $h$.