The basic K nuclear cluster K- pp and its enhanced formation in the p + p -> K+ + X reaction
| Autor: | Yamazaki, Toshimitsu, Akaishi, Yoshinori |
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| Rok vydání: | 2007 |
| Předmět: | |
| Zdroj: | Phys.Rev.C76:045201,2007 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevC.76.045201 |
| Popis: | We have studied the structure of K- pp nuclear cluster comprehensively by solving this three-body system exactly in a variational method starting from the Ansatz that the Lambda(1405) resonance (Lambda*) 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, B = 48 MeV and Gamma = 60 MeV remains unchanged by varying the Kba-rN and NN interactions widely as far as they reproduce Lambda(1405). The structure of K- pp reveals a molecular feature, namely, the K- in Lambda* 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+ + Lambda* + p, which occurs in a short impact parameter and with a large momentum transfer (Q ~ 1.6$ GeV/c), leads to unusually large self-trapping of Lambda* by the participating proton, since the Lambda*-p system exists as a compact doorway state propagating to K- pp (R{Lambda*-p} ~ 1.67 fm). Comment: 18 pages, 14 figures. Phys, Rev. C, in press |
| Databáze: | arXiv |
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