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Λ spin-orbit splitting deduced from DWIA analysis of the 89 Y (π + ,K + ) Λ 89 Y reaction. T. Motoba (Osaka E-C U.) D.J. Millener (Brookhaven N.L.) D. Lanskoy (Moscow State U.) Y. Yamamoto (Tsuru U.). (π+,K+) reaction characteristics.
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Λ spin-orbit splitting deducedfrom DWIAanalysis ofthe 89Y(π+,K+)Λ89Yreaction T. Motoba (Osaka E-C U.) D.J. Millener (Brookhaven N.L.) D. Lanskoy (Moscow State U.) Y. Yamamoto (Tsuru U.)
T.Motoba, H. Bando, R. Wunsch, J.Zofka, Phys. Rev.C38 (1988)
H. Hotchi et al, Phys. Rev. C64 044302 (2001). Great achievement good resolution Γ=1.65 MeV Ls splitting (ΔE): (f )=1.70 MeV (d)=1.63 (p)= 1.37
How to understand “large” splitting of subpeaks observed in heavy systems
Take core-excited states seriously: up to the level of p-shell hypernuclei
CONCLUSION (1)Reproduce cross section ratios among a series of pronounced peaks and sub-peaks.
CONCLUSION(2) Observed energy spacing betweendoublet like sub-peaks (3L-3R) are reproduced with δ(f)=0.20 MeV, which leads to δ(d)=0.15 MeV and δ(p)=0.09 MeV.(cf. Λ13C:δ(p)=0.152+-0.07 MeV)
CONCLUSION (3)even the GS peak should consists of two components. (See the exp. GS peak The present analysis leads to the prediction that.)
CONCLUSION (4)Right partner(s) contain parity-mixing contributions :example for 3R: [1p1/2f7/2hole]Λ(d3/2)
New insight into (π+,K+) spectra for other medium-heavy hypernuclei