Search for Light Higgs and Low Mass Dark Matter at Belle

We report a search for a light CP-odd Higgs boson $A^{0}$, which can be produced in $\Upsilon$ transitions and decay to low mass Dark Matter (DM). We search for evidence of on-shell and off-shell production of the light Higgs in $\Upsilon$(1S) decays via tagged dipion transitions from $\Upsilon$(2S) to $\Upsilon$(1S). We present the first Belle search for final states with a single high energy photon and missing energy in the mass range M$_{A^{0}}\leq$ 9.2 GeV and M$_{\text{DM}}\leq$ 4.5 GeV with a data sample of 157.3 $\times$ 10$^{6}$ $\Upsilon$(2S) decays. We also discuss the implications of our results for direct dark matter searches.