Correlation effects on the nonmesonic weak decay of the {lambda} hyperon in nuclear matter

Journal Article · Mon Aug 01 04:00:00 EDT 2005 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.72.024320· OSTI ID:20698907

Robertson, N J; Dickhoff, W H ^[1]

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1. Department of Physics, Washington University, St. Louis, Missouri 63130 (United States)

The nonmesonic weak decay of a {lambda} hyperon is studied in nuclear matter. Special emphasis is placed on a consistent treatment of correlations introduced by the strong interaction on its weak counterpart. The latter is described by the exchange of mesons between the initial {lambda}N state and the final NN one. The weak decay is studied in terms of the weak self-energy, which allows a systematic evaluation of short-range and tensor correlation effects that are determined by a realistic hyperon-nucleon interaction. The admixture of {sigma}N components through the strong interaction is also included in the calculation of the {lambda} decay properties. Calculations for the ratio of the neutron-induced partial width to the corresponding proton-induced one, {gamma}{sub n}/{gamma}{sub p}, are discussed in connection with recent experimental results.

• OSTI ID: 20698907
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 2 Vol. 72; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CORRELATIONS
LAMBDA BARYONS
NEUTRONS
NUCLEAR MATTER
NUCLEON-HYPERON INTERACTIONS
PARTICLE DECAY
PROTONS
SELF-ENERGY
STRONG INTERACTIONS
TENSORS