2009/04/30 by Takayasu Sekihara, Daisuke Jido, Yoshiko Kanada-En’yo +1 · 2 citations
Earth and Planetary Sciences · Physics and Astronomy · #High-pressure geophysics and materials #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #nucl-th
paper · pdf · doi:10.1103/physrevc.79.062201
published as Phys.Rev.C79:062201,2009 · 5 pages, 4 figures
arxiv created 2009/05/26 · openalex publication_date 2009/06/29 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
Nonmesonic decay of kaonic nuclei is investigated under a \ensuremathΛ(1405) doorway picture in which the K absorptions in nuclei take place through the \ensuremathΛ(1405) resonance. Calculating \ensuremathΛ(1405)N\ensuremath→YN transitions with one-meson exchange, we find that the nonmesonic decay ratio \ensuremathΓ_\ensuremathΛN/\ensuremathΓ_\ensuremathΣ0N depends strongly on the ratio of the couplings \ensuremathΛ(1405)\text\ensuremath-KN and \ensuremathΛ(1405)\text\ensuremath-\ensuremathπ\ensuremathΣ. Especially, a larger \ensuremathΛ(1405)\text\ensuremath-KN coupling leads to enhancement of the decay to \ensuremathΛN. Using the chiral unitary approach for description of the KN amplitudes, we obtain \ensuremathΓ_\ensuremathΛN/\ensuremathΓ_\ensuremathΣ0N\ensuremath≈1.2 almost independently of the nucleon density and find the total nonmesonic decay width calculated in uniform nuclear matter to be 22 MeV at the normal density.