The nonmesonic hypernuclear decay in a weak meson-exchange model

Journal Article · Mon Jul 10 04:00:00 EDT 1995 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.48471· OSTI ID:249361

Bennhold, C ^[1]; Ramos, A ^[2]

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1. Center of Nuclear Studies, Department of Physics, The George Washington University, Washington, D.C. 20052 (United States)
2. Departament d`Estructura i Constituents de la Materia, Facultat de Fisica, Diagonal 647, E-08028 Barcelona (Spain)

The nonmesonic weak decay of {Lambda} hypernuclei is studied in a relativistic shell model framework which includes a full strangeness-changing weak {Lambda}{ital N}{r_arrow}{ital NN} One-Boson-Exchange transition potential as well as a realistic {Lambda}{ital N} short-range correlation function. The total decay rate and the proton asymmetry, which represents a measure of the parity-violating to parity-conserving amplitudes, are in agreement with present experimental errors while the neutron-to-proton-induced ratio differs by more than a factor of two. In general, the observables were found to be dominated by the pion-exchange mechanism since the contributions of heavier mesons are suppressed by form factors and short-range correlations. {copyright} {ital 1995} {ital American} {ital Institute} {ital of} {ital Physics}.

• Sponsoring Organization: USDOE
• DOE Contract Number: FG05-86ER40270
• OSTI ID: 249361
• Report Number(s): CONF-940514--
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 338; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BARYON-BARYON INTERACTIONS
HYPERNUCLEI
LAMBDA PARTICLES
NUCLEONS
OBE MODEL
RELATIVISTIC RANGE
SHELL MODELS
WEAK PARTICLE DECAY