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arXiv 0709.0630nucl-th
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碱性K核团簇K-pp及其在p + p -> K+ + X反应中的增强形成

The basic K nuclear cluster K- pp and its enhanced formation in the p + p -> K+ + X reaction

Toshimitsu Yamazaki, Yoshinori Akaishi

摘要:

本文从λ(1405)共振(λ ~*)是K-p束缚态出发,用变分法精确求解K-p核团簇的三体系统,全面研究了K-p核团簇的结构。我们已经发现,我们最初对K-pp作为一个紧凑束缚系统(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)存在的预测导致参与质子对λ * 的异常大的自陷,因为λ *-p系统作为一个向K-pp传播的紧凑门口态存在(R{λ *-p} ~ 1.67 fm)。

英文摘要:

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).

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