Phys. Rev. Lett. 93, 232501 (2004) [5 pages]Hypernuclear Fine Structure in Λ16O and the ΛN Tensor InteractionReceived 30 August 2004; published 29 November 2004 We have observed two γ-ray transitions in Λ16O from the 6.6 MeV excited 12- state to both ground-state spin-doublet members (11-,0-) by the (K-,π-γ) reaction. We have obtained the ground-state doublet spacing to be 26.4±1.6(stat)±0.5(syst) keV and the excitation energy of the 12- state to be 6561.7±1.1(stat)±1.7(syst) keV. The ground-state doublet spacing provides a small but nonzero strength of the tensor interaction between a Λ and a nucleon. This is the first experimental result on the ΛN tensor interaction. © 2004 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.93.232501
DOI:
10.1103/PhysRevLett.93.232501
PACS:
21.80.+a, 13.75.Ev, 23.20.Lv, 25.80.Nv
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