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Annual Review of Nuclear and Particle Science

Volume 68, 2018

Structure of =−2 Hypernuclei and Hyperon–Hyperon Interactions

Abstract

We review recent progress in =−2 hypernuclei such as double-Λ hypernuclei and Ξ hypernuclei, which are composed of a nucleus and one or two hyperons, such as a Λ or a Ξ particle. Through observations of He, such as the Nagara event, we obtain important information about the ΛΛ interaction. Using this information, we perform a four-body calculation of ααΛΛ for Be, which was observed at KEK as the Demachi–Yanagi event. We interpret this event as the excited state. We calculate energy levels of Be within the framework of an ααΛΛ five-body cluster model, and then interpret the Hida event, which was observed at KEK as the ground state of Be. Motivated by observation of the Kiso event of C, by using the Skyrme–Hartree–Fock and relativistic mean-field frameworks, we calculate the energy spectra of this hypernucleus. We interpret this event as the 14N(g.s.)+Ξ−(0) state. Finally, we propose an experiment on H and Li to extract information about the spin- and isospin-averaged parts of the Ξ interaction.

Keyword(s): few-body problem, hypernuclear physics, hyperon–hyperon interaction, nuclear emulsion
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/content/journals/10.1146/annurev-nucl-101917-021108
2018-10-19
2025-05-01
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/content/journals/10.1146/annurev-nucl-101917-021108
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Structure of S=−2 Hypernuclei and Hyperon–Hyperon Interactions
Annual Review of Nuclear and Particle Science 68, 131 (2018); https://doi.org/10.1146/annurev-nucl-101917-021108
/content/journals/10.1146/annurev-nucl-101917-021108
/content/journals/10.1146/annurev-nucl-101917-021108
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