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ヤマガタ ジュンコ
YAMAGATA JUNKO
山縣 淳子 所属 京都産業大学 理学部 物理科学科 職種 教授 |
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| 発行・発表の年月 | 2009 |
| 形態種別 | 研究論文（国際会議プロシーディングス） |
| 標題 | The (K-, p) reaction on 12C at KEK |
| 執筆形態 | その他 |
| 掲載誌名 | Nonlinear Phenomena in Complex Systems |
| 巻・号・頁 | 12(4),414-418頁 |
| 著者・共著者 | V. K. Magas,J. Yamagata-Sekihara,S. Hirenzaki,E. Oset,A. Ramos |
| 概要 | We study the (K-, p) reaction on 12C with a kaon beam of 1 GeV momentum, paying a special attention to the region of emitted protons having kinetic energy above 600 MeV, which was used to claim a deep kaon nucleus optical potential [1]. The experiment looks for fast protons emitted from the absorption of in flight kaons by nuclei, but in coincidence with at least one charged particle in the decay counters sandwiching the target. The analysis of the data is done in [1] assuming that the coincidence requirement does not change the shape of the final spectra. However our detailed calculations show that this assumption does not hold, and, thus, the final conclusion of this experiment is doubtful. We perform Monte Carlo simulation of this reaction. The advantage of our method with respect to Green's function method used in [1] is that it allows to account not only for quasi-elastic K-p scattering, but also for the other processes which contribute to the proton spectra. We investigated the effect of the multi-scatterings and of the K- absorptions by one and two nucleons (K-N → πY and K -NN → YN) followed by the decay of the hyperon in πN. We show that all these mechanisms allow us to explain reasonably well the observed spectrum with "standard" shallow kaon nucleus optical potential, obtained in chiral models. |
| ISSN | 1561-4085/1817-2458 |