{lambda}N{yields}NN weak interaction in effective-field theory

Journal Article · Mon Nov 01 00:00:00 EST 2004 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.70.051601· OSTI ID:20695712

Parreno, Assumpta ^[1]; Bennhold, Cornelius ^[2]; Holstein, Barry R ^[3]

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1. Departament ECM, Facultat de Fisica, Universitat de Barcelona, E-08028, Barcelona (Spain)
2. Center of Nuclear Studies, Department of Physics, George Washington University, Washington, DC 20052 (United States)
3. Department of Physics-LGRT, University of Massachusetts, Amherst, Massachusetts 01003 (United States)

The nonleptonic weak |{delta}S|=1 {lambda}N interaction, responsible for the dominant nonmesonic decay of all but the lightest hypernuclei, is studied in the framework of an effective-field theory. The long-range physics is described through tree-level exchange of the SU(3) Goldstone bosons, while the short-range potential is parametrized in terms of the lowest-order contact terms. We obtain reasonable fits to available weak hypernuclear decay rates and quote the values for the parity-violating asymmetry as predicted by the present effective-field theory.

• OSTI ID: 20695712
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 70, Issue 5; Other Information: DOI: 10.1103/PhysRevC.70.051601; (c) 2004 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ASYMMETRY
ENERGY-LEVEL TRANSITIONS
GOLDSTONE BOSONS
HYPERNUCLEI
ISOSPIN
NUCLEAR FORCES
NUCLEON-HYPERON INTERACTIONS
PARITY
PARTICLE DECAY
POTENTIALS
QUANTUM FIELD THEORY
SU-3 GROUPS
WEAK INTERACTIONS