Measurement of the ${\pi }^{-}$ decay width of ${}_{\Lambda }^5$He

Abstract

We have precisely measured $\Lambda \to p{\pi }^{-}$ decay width of \5LHe and demonstrated significantly larger $\alpha$ -$\Lambda$ overlap than expected from the central repulsion $\alpha$-$\Lambda$ potential, which is derived from YNG Λ$-nucleon interaction.

4 pages, 3 figures

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