$\Lambda d$ correlations from the ${}^4$He(stopped-$K^{-}$,$d$) reaction

Abstract

We have observed an intense high-energy component in an inclusive ${}^4$He(stopped $K^{-}$, $d$) spectrum. For back-to-back $\Lambda d$ pairs a prominent event cluster has been found just below the $m_{{}^4\text{He}}+m_{K^{-}}-m_n$ mass threshold in the $\Lambda d$ invariant mass spectrum of $\Lambda dn$ events, which is evidence for a three-nucleon absorption process of $K^{-}$ in ${}^4$He. In addition, an appreciable strength is revealed below $\sim$3220 MeV/$c^2$. Well separated ${\Sigma }^{0}dn$ events show a peak similar to the case of $\Lambda dn$.

4 pages, 4 figures, published in Physical Review C as a Brief Report

References in corpus (1)

• Correlated $\Lambda d$ pairs from the $K_{stop}^{-}A\to \Lambda d{A}^{\prime }$ reaction

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