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Ajimura, S; Hayakawa, H; Kishimoto, T; Kohri, H; Matsuoka, K; Minami, S; Mori, T; Morikubo, K; Saji, E; Sakaguchi, A; Shimizu, Y; Sumihama, M; Chrien, R E; May, M; Pile, P; Rusek, A; Sutter, R; Eugenio, P; Franklin, G; Khaustov, P; Paschke, K; Quinn, B P; Schumacher, R A; Franz, J; Fukuda, T; Noumi, H; Outa, H; Gan, L; Tang, L; Yuan, L; Tamura, H; Nakano, J; Tamagawa, T; Tanida, K; Sawafta, R
Physical review letters, 05/2001, Letnik: 86, Številka: 19Journal Article
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.
