$ΛN \to NN$ weak interaction in effective field theory

Details $ΛN \to NN$ weak interaction in effective field theory $ΛN \to NN$ weak interaction in effective field theory

2003-08-27

arxiv.org/abs/nucl-th/0308074v2

Phys.Rev. C70 (2004) 051601

Physics

Nuclear Physics

Nuclear Theory

5 pages, no figures. Leading order parity violating coefficients corrected. To appear in Phys. Rev. C (Rapid Communications)

Scientific paper

10.1103/PhysRevC.70.051601

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.

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