Partial reconstruction technique on e$+$ e- collision data from Belle experiment

Belle experiment collected 772 million B meson-anti B meson pairs at KEKB asymmetric energy e$+$ e- collider. This enormous data among other things also shed light on rare decay process of B mesons. Many reconstruction techniques have been successfully employed to study B meson decay involving neutrinos. Quality measurements with high-resolution demands high signal purity and hence hamper reconstruction efficiency. Partial reconstruction technique can be used on a subset of data where it promises higher efficiency while not deteriorating signal purity. I will discuss these techniques in general and show some preliminary estimates of partial reconstruction for a specific leptonic B meson decay.