Yamazaki Toshimitsu, Akaishi Yoshinori
Department of Physics, University of Tokyo, Tokyo, Japan . ; RIKEN Nishina Center, Saitama, Japan .
Proc Jpn Acad Ser B Phys Biol Sci. 2007 Jun;83(5):144-50. doi: 10.2183/pjab.83.144.
We have studied the structure of K (-) pp comprehensively by solving this threebody system in a variational method, starting from the Ansatz that the Λ(1405) resonance (≡Λ ()) is a K (-) p bound state. 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 point out that strongly bound K̄ nuclear systems are formed by "super strong" nuclear force due to migrating real bosonic particles K̄ a la Heitler-London-Heisenberg, whereas the normal nuclear force is caused by mediating virtual mesons. 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 involved proton, since the Λ (*)-p system exists as a compact doorway state propagating to K (-) pp.
我们通过变分法求解这个三体系统，全面研究了K(-)pp的结构，出发点是假设Λ(1405)共振态（≡Λ()）是一个K(-)p束缚态。K(-)pp的结构呈现出分子特征，即Λ()中的K(-)作为“原子中心”，在与另一个质子形成强共价键中起关键作用。我们指出，由于真实玻色子粒子K(-)像海特勒 - 伦敦 - 海森堡理论那样迁移，强束缚的反核子系统是由“超强”核力形成的，而正常核力是由虚介子介导产生的。我们已经表明，在短碰撞参数和大动量转移情况下发生的基本过程p + p → K(+) + Λ() + p，会导致参与的质子对Λ()产生异常大的自俘获，因为Λ(*) - p系统作为一个紧凑的门道态存在并传播到K(-)pp。
