Observation of spin-orbit splitting in lambda single-particle states

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...

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Veröffentlicht in:	Physical review letters 2001-05, Vol.86 (19), p.4255-4258
Hauptverfasser:	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
Format:	Artikel
Sprache:	eng
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Zusammenfassung:	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.
ISSN:	0031-9007 1079-7114
DOI:	10.1103/PhysRevLett.86.4255