{lambda}(1405)-induced nonmesonic decay in kaonic nuclei

Journal Article · Mon Jun 15 04:00:00 EDT 2009 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.79.062201· OSTI ID:21289897

Sekihara, T ^[1]; Jido, D; Kanada-En'yo, Y ^[2]

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1. Department of Physics, Kyoto University, Kyoto 606-8502 (Japan)
2. Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-8502 (Japan)

Nonmesonic decay of kaonic nuclei is investigated under a {lambda}(1405) doorway picture in which the K absorptions in nuclei take place through the {lambda}(1405) resonance. Calculating {lambda}(1405)N{yields}YN transitions with one-meson exchange, we find that the nonmesonic decay ratio {gamma}{sub {lambda}}{sub N}/{gamma}{sub {sigma}{sup 0}}{sub N} depends strongly on the ratio of the couplings {lambda}(1405)-KN and {lambda}(1405)-{pi}{sigma}. Especially, a larger {lambda}(1405)-KN coupling leads to enhancement of the decay to {lambda}N. Using the chiral unitary approach for description of the KN amplitudes, we obtain {gamma}{sub {lambda}}{sub N}/{gamma}{sub {sigma}{sup 0}}{sub N}{approx_equal}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.

• OSTI ID: 21289897
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 6 Vol. 79; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
AMPLITUDES
BOSON-EXCHANGE MODELS
CHIRALITY
COUPLING
K ABSORPTION
LAMBDA-1405 BARYONS
MEV RANGE 10-100
NUCLEAR MATTER
NUCLEI
NUCLEONS
RESONANCE