Constraints on the threshold K- nuclear potential from FINUDA (stopped K-, pi-) hypernuclear spectra

Abstract

1s(Lambda) hypernuclear formation rates in stopped K- reactions on several p-shell targets are derived from hypernuclear formation spectra measured recently by the FINUDA Collaboration and are compared with calculated 1s(Lambda) formation rates based on a KbarN coupled channels chiral model. The calculated rates are about 15% of the derived rates, depending weakly on the depth of the threshold K- nuclear potential. The A dependence of the calculated rates is in fair agreement with that of the derived rates, showing a slight preference for a deep density dependent K- nuclear potential of depth (150-200) MeV at nuclear matter density over a shallow potential of depth about 50 MeV. These new features originate from a substantial energy and density dependence found for the in-medium subthreshold (K- n --> pi- Lambda) branching ratio that serves as input to the K- capture at rest calculations.

12 pages, 2 figures, 2 tables; v2 is a substantially revised version, v3 matches journal version

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• Nuclear kaon dynamics
• K${}^{-}$-proton scattering and the $\Lambda (1405)$ in dense matter
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• Multi-$\bar{K}$ hypernuclei
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Cited by in corpus (15)

• Strangeness in nuclear physics
• Chirally motivated $\bar{K}N$ amplitudes for in-medium applications
• Strangeness nuclear physics: a critical review on selected topics
• Chirally motivated K^- nuclear potentials
• Hypernuclear spectroscopy with K${}^{-}$ at rest on ${}^7$Li, ${}^9$Be, ${}^{13}$C and ${}^{16}$O
• Recent studies of kaonic atoms and nuclear clusters
• In-medium Eta-Nucleon interactions and Eta nuclear bound states
• Kaonic atoms and in-medium $K^{-}N$ amplitudes
• The $A(K_{stop}^{-},{\pi }^{\pm }{\Sigma }^{\mp })A^{\prime }$ reaction on p-shell nuclei
• Future directions in kaonic atom physics
• In-medium antikaon interactions and bound states
• Probable alpha and $14$^C cluster emission from hyper Ac nuclei
• Nuclear density probed by Kaon-Nucleus systems and Kaon-Nucleus interaction
• Separable potential model for meson-baryon interaction beyond the S-wave
• Energy dependence of $\bar{K}N$ interaction in nuclear medium