{
  "date" : "2003-10-20",
  "identifier_doecontract" : "",
  "subject" : "72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ASYMMETRY; BRANCHING RATIO; CARBON 12; COUPLING; EFFECTIVE MASS; HAMILTONIANS; HELIUM 5; HYPERNUCLEI; MASS; MESONS; PARTICLE KINEMATICS; PERIPHERAL MODELS; PIONS; PROTON-EMISSION DECAY; SIMULATION; STRANGENESS; TRANSITION AMPLITUDES",
  "description" : "We make a careful study about the nonrelativistic reduction of one-meson-exchange models for the nonmesonic weak hypernuclear decay. Starting from a widely accepted effective coupling Hamiltonian involving the exchange of the complete pseudoscalar and vector meson octets ({pi}, {eta}, K, {rho}, {omega}, K{sup *}), the strangeness-changing weak {lambda}N{yields}NN transition potential is derived, including two effects that have been systematically omitted in the literature, or, at best, only partly considered. These are the kinematical effects due to the difference between the lambda and nucleon masses, and the first-order nonlocality corrections, i.e., those involving up to first-order differential operators. Our analysis clearly shows that the main kinematical effect on the local contributions is the reduction of the effective pion mass. The kinematical effect on the nonlocal contributions is more complicated, since it activates several new terms that would otherwise remain dormant. Numerical results for {sup 12}{sub {lambda}}C and {sup 5}{sub {lambda}}He are presented and they show that the combined kinematical plus nonlocal corrections have an appreciable influence on the partial decay rates. However, this is somewhat diminished in the main decay observables: the total nonmesonic rate, {gamma}{sub nm}, the neutron-to-proton branching ratio, {gamma}{sub n}/{gamma}{sub p}, and the asymmetry parameter, a{sub {lambda}}. The latter two still cannot be reconciled with the available experimental data. The existing theoretical predictions for the sign of a{sub {lambda}} in {sup 5}{sub {lambda}}He are confirmed.",
  "language" : "English",
  "identifier_report" : "",
  "publisher_sponsor" : "",
  "publisher_country" : "Netherlands",
  "source" : "NLN",
  "purl" : "",
  "title" : "Kinematical and nonlocality effects on the nonmesonic weak hypernuclear decay",
  "type" : "Journal Article",
  "subject_related" : "",
  "relation" : "Journal Name: Nuclear Physics. A; Journal Volume: 726; Journal Issue: 3-4; Other Information: DOI: 10.1016/S0375-9474(03)01620-8; PII: S0375947403016208; Copyright (c) 2003 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: Belarus; PBD: 20 Oct 2003",
  "entry_date" : "2010-12-31",
  "subject_list" : [ "72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS", "ASYMMETRY", "BRANCHING RATIO", "CARBON 12", "COUPLING", "EFFECTIVE MASS", "HAMILTONIANS", "HELIUM 5", "HYPERNUCLEI", "MASS", "MESONS", "PARTICLE KINEMATICS", "PERIPHERAL MODELS", "PIONS", "PROTON-EMISSION DECAY", "SIMULATION", "STRANGENESS", "TRANSITION AMPLITUDES" ],
  "publisher_availability" : "",
  "rights" : "",
  "announced_date" : "2004-06-17",
  "type_qualifier" : "",
  "has_fulltext" : false,
  "coverage" : "",
  "identifier" : "",
  "journal_volume" : "726",
  "creator" : "Barbero, C; Conti, C de; Galeao, A P; Krmpotic, F",
  "site_ownership_code" : "NLN",
  "osti_id" : "20465597",
  "journal_issue" : "3-4",
  "resource_type" : "JOUR",
  "format" : "Medium: X; Size: page(s) 267-302",
  "journal_name" : [ ],
  "contributing_organizations" : "",
  "citation_location" : "https://www.osti.gov/etdeweb/biblio/20465597",
  "publication_year" : 2003,
  "subject_list_commas" : "72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS, ASYMMETRY, BRANCHING RATIO, CARBON 12, COUPLING, EFFECTIVE MASS, HAMILTONIANS, HELIUM 5, HYPERNUCLEI, MASS, MESONS, PARTICLE KINEMATICS, PERIPHERAL MODELS, PIONS, PROTON-EMISSION DECAY, SIMULATION, STRANGENESS, TRANSITION AMPLITUDES",
  "publisher" : "",
  "identifier_other" : "Journal ID: ISSN 0375-9474; NUPABL; TRN: NL04R2755040959",
  "publisher_research" : "",
  "creators_list" : [ "Barbero, C", "Conti, C de", "Galeao, A P", "Krmpotic, F" ],
  "doi" : "https://doi.org/10.1016/S0375-9474(03)01620-8"
}