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Structure of a Λ-hypernucleus ΛY measured with the SKS spectrometer |
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| Authors: | Tomofumi NagaeH. Hotchi H. Outa H. Noumi M. Sekimoto T. Fukuda H. C. Bhang Y. D. Kim J. H. Kim H. Park L. I. Tang R. Sawafta K. Tanida O. Hashimoto H. Tamura T. Saito T. Takahashi Y. Sato T. Endo S. Satoh J. Nishida T. Miyoshi T. Kishimoto A. Sakaguchi S. Ajimura Y. Shimizu T. Mori S. Minami M. Sumihama |
| Affiliation: | a) High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba, Ibaraki 305, Japan b) KEK, Japan c) Seoul National University, South Korea d) Hampton University, USA e) North Carolina A&T, USA f) University of Tokyo, Japan g) Tohoku University, Japan h) Osaka University, Japan |
| Abstract: | We have measured an excitation energy spectrum of a Λ-hypernucleus Λ89Y via the (π+, K+) reaction by using the SKS spectrometer at KEK. The best quality data with the energy resolution of 1.63 MeV(FWHM) was obtained in the highest statistics so far. In the spectrum, we can find a splitting of the f-orbital of a Λ particle with the separation of 1.6±0.15 MeV(statistical error only), which may be attributed to the spin-orbit splitting. |
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