منابع مشابه
Strange dibaryon and K̄NN - πΣN coupled channel equation
¯ KN N three body resonance has been studied by ¯ KN N − πΣN coupled channel Faddeev equation. The S-matrix pole has been investigated using the analytically continued scattering amplitude on the unphysical Riemann sheet. As a result we found a three-body resonance of strange dibaryon system with the binding energy and width B ∼ 76MeV and Γ ∼ 54MeV.
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We give some general arguments in favor of the large magnitude of matrix elements of an operator associated with nonvalence quarks in heavy hadrons. We estimate matrix element 1 2mΛb 〈Λb|s̄s|Λb〉 ≃ 1 ÷ 2 for Λb baryon whose valence content is b, u, d quarks. This magnitude corresponds to a noticeable contribution of the strange quark into the heavy baryon mass 1 2mΛb 〈Λb|mss̄s|Λb〉 ≃ 200 ÷ 300MeV ....
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As a consequence of the large coupling strength of Quantum–Chromo Dynamics (QCD) at low and intermediate energies, standard perturbative methods fail — in fact, the interaction gets so strong at increasing distances that it confines all color–charged particles (quarks and gluons) into areas of the order of 10 m — only those particles that are neutral with respect to the color force (these are c...
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ژورنال
عنوان ژورنال: Progress of Theoretical Physics
سال: 1985
ISSN: 0033-068X,1347-4081
DOI: 10.1143/ptp.74.1161