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Prog. Theor. Phys. Supplement No.156 (2004) pp. 104-123

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Experimental Progress in Hypernuclear Physics

Hirokazu Tamura

Department of Physics, Tohoku University, Sendai 980-8578, Japan

Abstract:

Recent experimental progress of hypernuclear physics is reviewed. Detailed level structure of various p-shell Λ hypernuclei has been investigated by γ-ray spectroscopy with Hyperball and an NaI counter array, and the strengths of all the spin-dependent components of the ΛN interaction have been determined. The (e,e'K+) reaction has been successfully introduced to hypernuclear spectroscopy at Jefferson Laboratory with a resolution better than 1 MeV (FWHM). The first experiment with the (π-,K+) reaction was carried out at KEK to produce neutron-rich hypernuclei. Double hypernuclear events interpreted as ΛΛ4H were observed by detecting two π-'s from sequential weak decay. In an emulsion-counter hybrid experiment, a double Λ hypernucleus 6ΛΛHe was observed and the strength of the ΛΛ interaction was unambiguously derived. A series of KEK experiments studying weak decays of 5ΛHe and 12ΛC have solved the so-called Γn/Γp ratio puzzle.


URL : http://ptp.ipap.jp/link?PTPS/156/104/
DOI : 10.1143/PTPS.156.104

[ Full Text PDF : FREE ACCESS (828K) ] Citation:

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