Spin-orbit splitting of {sub {lambda}}{sup 9}Be excited states studied with the SU{sub 6} quark-model baryon-baryon interactions
- Department of Physics, Kyoto University, Kyoto 606-8502 (Japan)
- Physics Division, Kyushu Dental College, Kitakyushu 803-8580 (Japan)
- Department of Applied Physics, Okayama Science University, Okayama 700-0005 (Japan)
- Department of Physics, Niigata University, Niigata 950-2181 (Japan)
The previous Faddeev calculation of the two-alpha plus {lambda} system for {sub {lambda}}{sup 9}Be is extended to incorporate the spin-orbit components of the SU{sub 6} quark-model (QM) baryon-baryon interactions. We employ the Born kernel of the QM {lambda}N LS interaction and generate the spin-orbit component of the {lambda}{alpha} potential by {alpha}-cluster folding. The Faddeev calculation in the jj-coupling scheme implies that the direct use of the QM Born kernel for the {lambda}N LS component is not good enough to reproduce the small experimental value {delta}E{sub ls}{sup expt}=43{+-}5 keV for the 5/2{sup +}-3/2{sup +} splitting. This procedure predicts 3-5 times larger values in the models FSS and fss2. The spin-orbit contribution from the effective meson-exchange potentials in fss2 is argued to be unfavorable to the small ls splitting, through the analysis of the Scheerbaum factors for the single-particle spin-orbit potentials calculated in the G-matrix formalism.
- OSTI ID:
- 20695696
- Journal Information:
- Physical Review. C, Nuclear Physics, Vol. 70, Issue 4; Other Information: DOI: 10.1103/PhysRevC.70.047002; (c) 2004 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
Similar Records
Low-lying spectra of {sup 9}{Lambda}Be and {sup 9}Be within three-cluster model
An {alpha}-cluster model for {sub {Lambda}}{sup 9}Be spectroscopy