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Λ spin-orbit splitting deduced from DWIA analysis of the 89 Y (π + ,K + ) Λ 89 Y reaction

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 deduced from DWIA analysis of the 89 Y (π + ,K + ) Λ 89 Y reaction

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  1. 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.)

  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)

  8. XS ratio is determined as

  9. EXP vs. DWIA CAL(WS, VLS=4.3MeV)

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

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

  12. 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)

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

  14. CONCLUSION (4)Right partner(s) contain parity-mixing contributions :example for 3R: [1p1/2f7/2hole]Λ（d3/2）

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

  16. END

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