"${\text{K}}^{-}\text{p}\text{p}$", a $\overline{K}$-Meson Nuclear Bound State, Observed in ${}^3\mathrm{He}(K^{-},\Lambda p)n$ Reactions

PARC E15 collaboration, S. Ajimura, H. Asano +67

We observed a distinct peak in the $\Lambda p$ invariant mass spectrum of ${}^3\mathrm{He}(K^{-},\Lambda p)n$, well below the mass threshold of $m_K+2m_p$. By selecting a relatively large mome…