Few-body aspects of light hypernuclei - INSPIRE

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Few-body aspects of light hypernuclei

E. Hiyama
(
- KEK, Tsukuba
)
,
M. Kamimura
(
- Kyushu U.
)
,
T. Motoba
(
- Osaka Electrocommunications U.
)
,
T. Yamada
(
- Kanto Gakuin U.
)
,
Y. Yamamoto
(
- Tsuru U.
)

2004

9 pages

Part of Proceedings, 17th International IUPAP Conference on Few-body problems in physics (FB17) : Durham, USA, June 5-10, 2003

Published in:

Nucl.Phys.A 737 (2004) 138-146

Contribution to:

- FB17

DOI:

10.1016/j.nuclphysa.2004.03.055

reference search6 citations

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Abstract: (Elsevier)

Three- and four-body structure calculations of single Λ hypernuclei such as Λ 7 He, Λ 9 Be and Λ 13 C and double Λ hypernuclei such as ΛΛ 4 H, ΛΛ 7 He, ΛΛ 7 Li, ΛΛ 8 Li, ΛΛ 9 Li, ΛΛ 9 Be and ΛΛ 10 Be are discussed. The energy levels of Λ 7 He whose core is a famous halo nucleus, Λ 6 He, are predicted based on Λ 5 He + 2 N three-body model. In the microscopic 2α + Λ(3α + Λ) model for Λ 9 Be( Λ 13 C), we predict the spin-orbit splittings of 5/2 1 + −3/2 1 + in Λ 9 Be and 3/2 1 − −1/2 1 − in Λ 13 C to be 0.08–0.16 MeV and 0.39–0.78 MeV, respectively, with the use of OBE-model NSC97a ∼f. On the other hand quark-model Λ N spin-orbit force gives rise to half of the splittings of the smallest OBE-model prediction. The experimental data were reported to be 31.4 −3.6 +2.5 keV for Λ 9 Be and to be 152 ± 54 ± 36 keV for Λ 13 C. By performing four-body calculation of ΛΛ 4 H with both NN ΛΛ and NNN Ξ channels, we show that the ΛΛ − Ξ N coupling potential plays an important role in making ΛΛ 4 H. Energy levels of the double-Λ hypernuclei, ΛΛ 7 He, ΛΛ 7 Li, ΛΛ 8 Li, ΛΛ 9 Li, ΛΛ 9 Be and ΛΛ 10 Be are predicted on the basis of an α + x + Λ + Λ four-body model, where x = n , p , d , t 3 He and α, respectively.

talk: Durham 2003/06/05

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Figures(0)

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