  A search for a new resonance decaying to a $W$ or $Z$ boson and a Higgs boson
in the $\ell \ell/ \ell \nu/ \nu \nu + b \bar{b}$ final states is performed
using 20.3 fb$^{-1}$ of $pp$ collision data recorded at $\sqrt{s}=$ 8 TeV with
the ATLAS detector at the Large Hadron Collider. The search is conducted by
examining the $WH/ZH$ invariant mass distribution for a localized excess. No
significant deviation from the Standard Model background prediction is
observed. The results are interpreted in terms of constraints on the Minimal
Walking Technicolor model and on a simplified approach based on a
phenomenological Lagrangian of Heavy Vector Triplets.
