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Prog. Theor. Phys. Supplement No.168 (2007) pp. 581-588

[ Full Text PDF : FREE ACCESS (416K) ]

The Fundamental Kaonic Nuclear Cluster K-pp

— Its Structure and Formation —

Toshimitsu Yamazaki1,2,* and Yoshinori Akaishi2,3,**

1Department of Physics, University of Tokyo, Tokyo 113-0033, Japan
2RIKEN Nishina Center, Wako 351-0198, Japan
3College of Science and Technology, Nihon University, Funabashi 274-8501, Japan

Abstract:

We have studied the structure of K- pp comprehensively by solving this three-body system exactly in a variational method, starting from the Ansatz that the Λ(1405) resonance (≡Λ*) is a K-p bound state. We have found that our original prediction for the presence of K-pp as a compact bound system with M = 2322 MeV/c2, BK = 48 MeV and Γ = 61 MeV remains unchanged by varying the KN and NN interactions widely as far as they reproduce Λ(1405). The structure of K-pp reveals a molecular feature, namely, the K- in Λ* as an “atomic center" plays a key role in producing strong covalent bonding with the other proton. We have shown that the elementary process, p + p →K+ + Λ* + p, which occurs in a short impact parameter and with a large momentum transfer, leads to unusually large self-trapping of Λ* by the participating proton, since the Λ*-p system exists as a compact doorway state propagating to K-pp.


URL : http://ptp.ipap.jp/link?PTPS/168/581/
DOI : 10.1143/PTPS.168.581


*E-mail: yamazaki@nucl.phys.s.u-tokyo
**E-mail: akaishi@post.kek.jp

[ Full Text PDF : FREE ACCESS (416K) ] Citation:

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