We show how the \tau ⁺\tau ^- spin correlations can be used to improve the recognition of the parent boson spin, and hence to identify scalar boson H⁰\to \tau ⁺\tau ^- events from the vector boson Z/\gamma ^*\to \tau ⁺\tau ^- background in high energy accelerator experiments.

PACS numbers: 14.60.Fg