Hypernuclear fine structure in (16)(Lambda)O and the LambdaN tensor interaction.

Authors :: Ukai M
Ajimura S
Akikawa H
Alburger DE
Banu A
Chrien RE
Franklin GB
Franz J
Hashimoto O
Hayakawa T
Hotchi H
Imai K
Kishimoto T
May M
Millener DJ
Minami S
Miura Y
Miyoshi T
Mizunuma K
Nagae T
Nakamura SN
Nakazawa K
Okayasu Y
Pile P
Quinn BP
Rusek A
Sato Y
Sutter R
Takahashi H
Tang L
Tamura H
Tanida K
Yuan L
Zhou SH
Source :: Physical review letters [Phys Rev Lett] 2004 Dec 03; Vol. 93 (23), pp. 232501. Date of Electronic Publication: 2004 Nov 29.
Publication Year :: 2004
Abstract: We have observed two gamma-ray transitions in (16)(Lambda)O from the 6.6 MeV excited 1(-)(2) state to both ground-state spin-doublet members (1(-)(1),0(-)) by the (K-,pi(-)gamma) 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 1(-)(2) 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 Lambda and a nucleon. This is the first experimental result on the LambdaN tensor interaction.

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