title: Observation of spin-orbit splitting in lambda single-particle states.
abstract: The spin-orbit splitting of Lambda single-particle states in (13)(Lambda)C was measured. The 13C(K-,pi(-))(13)(Lambda)C reaction was used to excite both the 1/2(-) and 3/2(-) states simultaneously, which have predominantly 12C(0(+)) x p(Lambda) configuration. gamma rays from the states to the ground state were measured in coincidence with the pi(-)'s, by which ls splitting was found to be 152+/-54(stat)+/-36(syst) keV. The value is 20-30 times smaller than exhibited by the ls splitting in the nuclear shell model. This value gives us new insight into the YN interaction.
authors.affiliation: Department of Physics, Osaka University, Toyonaka, Osaka, 560-0043, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Ajimura
authors.forename: H
authors.initials: H
authors.lastname: Hayakawa
authors.forename: T
authors.initials: T
authors.lastname: Kishimoto
authors.forename: H
authors.initials: H
authors.lastname: Kohri
authors.forename: K
authors.initials: K
authors.lastname: Matsuoka
authors.forename: S
authors.initials: S
authors.lastname: Minami
authors.forename: T
authors.initials: T
authors.lastname: Mori
authors.forename: K
authors.initials: K
authors.lastname: Morikubo
authors.forename: E
authors.initials: E
authors.lastname: Saji
authors.forename: A
authors.initials: A
authors.lastname: Sakaguchi
authors.forename: Y
authors.initials: Y
authors.lastname: Shimizu
authors.forename: M
authors.initials: M
authors.lastname: Sumihama
authors.forename: R E
authors.initials: RE
authors.lastname: Chrien
authors.forename: M
authors.initials: M
authors.lastname: May
authors.forename: P
authors.initials: P
authors.lastname: Pile
authors.forename: A
authors.initials: A
authors.lastname: Rusek
authors.forename: R
authors.initials: R
authors.lastname: Sutter
authors.forename: P
authors.initials: P
authors.lastname: Eugenio
authors.forename: G
authors.initials: G
authors.lastname: Franklin
authors.forename: P
authors.initials: P
authors.lastname: Khaustov
authors.forename: K
authors.initials: K
authors.lastname: Paschke
authors.forename: B P
authors.initials: BP
authors.lastname: Quinn
authors.forename: R A
authors.initials: RA
authors.lastname: Schumacher
authors.forename: J
authors.initials: J
authors.lastname: Franz
authors.forename: T
authors.initials: T
authors.lastname: Fukuda
authors.forename: H
authors.initials: H
authors.lastname: Noumi
authors.forename: H
authors.initials: H
authors.lastname: Outa
authors.forename: L
authors.initials: L
authors.lastname: Gan
authors.forename: L
authors.initials: L
authors.lastname: Tang
authors.forename: L
authors.initials: L
authors.lastname: Yuan
authors.forename: H
authors.initials: H
authors.lastname: Tamura
authors.forename: J
authors.initials: J
authors.lastname: Nakano
authors.forename: T
authors.initials: T
authors.lastname: Tamagawa
authors.forename: K
authors.initials: K
authors.lastname: Tanida
authors.forename: R
authors.initials: R
authors.lastname: Sawafta