The nonmesonic hypernuclear decay in a weak meson-exchange model
- Center of Nuclear Studies, Department of Physics, The George Washington University, Washington, D.C. 20052 (United States)
- 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-; ISSN 0094-243X; TRN: 96:014334
- Journal Information:
- AIP Conference Proceedings, Vol. 338, Issue 1; Conference: 5. conference on intersections between particle and nuclear physics, St. Petersburg, FL (United States), 31 May - 6 Jun 1994; Other Information: PBD: 10 Jul 1995
- Country of Publication:
- United States
- Language:
- English
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