title: Hypernuclear fine structure in (16)(Lambda)O and the LambdaN tensor interaction.
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.
authors.affiliation: Department of Physics, Tohoku University, Sendai 980-8578, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Ukai
authors.forename: S
authors.initials: S
authors.lastname: Ajimura
authors.forename: H
authors.initials: H
authors.lastname: Akikawa
authors.forename: D E
authors.initials: DE
authors.lastname: Alburger
authors.forename: A
authors.initials: A
authors.lastname: Banu
authors.forename: R E
authors.initials: RE
authors.lastname: Chrien
authors.forename: G B
authors.initials: GB
authors.lastname: Franklin
authors.forename: J
authors.initials: J
authors.lastname: Franz
authors.forename: O
authors.initials: O
authors.lastname: Hashimoto
authors.forename: T
authors.initials: T
authors.lastname: Hayakawa
authors.forename: H
authors.initials: H
authors.lastname: Hotchi
authors.forename: K
authors.initials: K
authors.lastname: Imai
authors.forename: T
authors.initials: T
authors.lastname: Kishimoto
authors.forename: M
authors.initials: M
authors.lastname: May
authors.forename: D J
authors.initials: DJ
authors.lastname: Millener
authors.forename: S
authors.initials: S
authors.lastname: Minami
authors.forename: Y
authors.initials: Y
authors.lastname: Miura
authors.forename: T
authors.initials: T
authors.lastname: Miyoshi
authors.forename: K
authors.initials: K
authors.lastname: Mizunuma
authors.forename: T
authors.initials: T
authors.lastname: Nagae
authors.forename: S N
authors.initials: SN
authors.lastname: Nakamura
authors.forename: K
authors.initials: K
authors.lastname: Nakazawa
authors.forename: Y
authors.initials: Y
authors.lastname: Okayasu
authors.forename: P
authors.initials: P
authors.lastname: Pile
authors.forename: B P
authors.initials: BP
authors.lastname: Quinn
authors.forename: A
authors.initials: A
authors.lastname: Rusek
authors.forename: Y
authors.initials: Y
authors.lastname: Sato
authors.forename: R
authors.initials: R
authors.lastname: Sutter
authors.forename: H
authors.initials: H
authors.lastname: Takahashi
authors.forename: L
authors.initials: L
authors.lastname: Tang
authors.forename: H
authors.initials: H
authors.lastname: Tamura
authors.forename: K
authors.initials: K
authors.lastname: Tanida
authors.forename: L
authors.initials: L
authors.lastname: Yuan
authors.forename: S H
authors.initials: SH
authors.lastname: Zhou