1. 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.)

2. (π+,K+) reaction characteristics

3. T.Motoba, H. Bando, R. Wunsch, J.Zofka, Phys. Rev.C38 (1988)

4. 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

5. High resolution γ-ray mesurements

6. How to understand “large” splitting of subpeaks observed in heavy systems

7. ΔE is not proportional to (2l+1)

9. XS ratio is determined as

10. EXP vs. DWIA CAL( WS, V LS = 4.3MeV )

11. Take core-excited states seriously ： up to the level of p-shell hypernuclei

19. CONCLUSION (1)Reproduce cross section ratios among a series of pronounced peaks and sub-peaks.

20. CONCLUSION (2) Observed energy spacing between doublet 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. Λ １３ C:δ(p)=0.152+-0.07 MeV)

21. CONCLUSION （３） even the GS peak should consists of two components. (See the exp. GS peak The present analysis leads to the prediction that.)

22. CONCLUSION (4) Right partner(s) contain parity-mixing contributions : example for 3R: [1p 1/2 f 7/2hole ] Λ （ d 3/2 ）

25. New insight into (π+,K+) spectra for other medium-heavy hypernuclei

26. END