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Super strong nuclear force caused by migrating K̄ mesons - Revival of the Heitler-London-Heisenberg scheme in kaonic nuclear clusters.

Yamazaki T, Akaishi Y - Proc. Jpn. Acad., Ser. B, Phys. Biol. Sci. (2007)

Bottom Line: 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.

View Article: PubMed Central - PubMed

Affiliation: Department of Physics, University of Tokyo, Tokyo, Japan . ; RIKEN Nishina Center, Saitama, Japan .

ABSTRACT
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.

No MeSH data available.


(Left) Diagram for the p(p,K+)K−pp reaction. (Right) Calculated spectral shape for different rms distances R(Λ*p), arbitrarily chosen. The binding energy of K−pp is set to be 86 MeV for the K̄N interaction which is 17 % enhanced. In this case, R(Λ*p) = 1.45 fm is realistic.
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f3-83_144: (Left) Diagram for the p(p,K+)K−pp reaction. (Right) Calculated spectral shape for different rms distances R(Λ*p), arbitrarily chosen. The binding energy of K−pp is set to be 86 MeV for the K̄N interaction which is 17 % enhanced. In this case, R(Λ*p) = 1.45 fm is realistic.

Mentions: We expect that the K−pp state as a Λ*p composite can be formed in the p + p reaction:[5.1]p+p→K++(Λ*p)→K++K−pp.The reaction diagram is shown in Fig. 3 (Left). Essentially, the spectral function for K−pp is composed of the following three factors: i) the collision range 1/mB, taken to be the ρ meson mass; mB = mρ = 770 MeV/c2, ii) the momentum transfer, Q ∼ 1.6 GeV/c, and iii) the structure function, depending on the rms distance R(Λ*p) of the Λ*-p system.


Super strong nuclear force caused by migrating K̄ mesons - Revival of the Heitler-London-Heisenberg scheme in kaonic nuclear clusters.

Yamazaki T, Akaishi Y - Proc. Jpn. Acad., Ser. B, Phys. Biol. Sci. (2007)

(Left) Diagram for the p(p,K+)K−pp reaction. (Right) Calculated spectral shape for different rms distances R(Λ*p), arbitrarily chosen. The binding energy of K−pp is set to be 86 MeV for the K̄N interaction which is 17 % enhanced. In this case, R(Λ*p) = 1.45 fm is realistic.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3756877&req=5

f3-83_144: (Left) Diagram for the p(p,K+)K−pp reaction. (Right) Calculated spectral shape for different rms distances R(Λ*p), arbitrarily chosen. The binding energy of K−pp is set to be 86 MeV for the K̄N interaction which is 17 % enhanced. In this case, R(Λ*p) = 1.45 fm is realistic.
Mentions: We expect that the K−pp state as a Λ*p composite can be formed in the p + p reaction:[5.1]p+p→K++(Λ*p)→K++K−pp.The reaction diagram is shown in Fig. 3 (Left). Essentially, the spectral function for K−pp is composed of the following three factors: i) the collision range 1/mB, taken to be the ρ meson mass; mB = mρ = 770 MeV/c2, ii) the momentum transfer, Q ∼ 1.6 GeV/c, and iii) the structure function, depending on the rms distance R(Λ*p) of the Λ*-p system.

Bottom Line: 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.

View Article: PubMed Central - PubMed

Affiliation: Department of Physics, University of Tokyo, Tokyo, Japan . ; RIKEN Nishina Center, Saitama, Japan .

ABSTRACT
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.

No MeSH data available.