Four-baryon point ΛNNN interaction for the nonmesonic weak decay of the hypernuclei Λ4H,Λ4He,Λ5He, and Λ12C

Jung-Hwan Jun
Phys. Rev. C 63, 044012 – Published 21 March 2001
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Abstract

In an effort to resolve the theoretical difficulties in explaining the total and partial decay rates and the ratio Γn/Γp, a four-baryon point ΛNNN interaction is suggested as a new model for the short-range part of the nonmesonic weak decay of hypernuclei in addition to the traditional one-pion-exchange model for the long-range part. It is shown that with any value of the axial vector coupling constant gA in the range 0.1<~gA<~0.3 for the isoscalar weak current of nucleons, i.e., p(n)p(n) transitions, the partial and the total nonmesonic decay rates Γn, Γp, and Γnm=Γn+Γp and the ratios Γn/Γp of Λ4He, Λ5He, and Λ12C are excellently fitted in the experimental data.

  • Received 15 May 2000

DOI:https://doi.org/10.1103/PhysRevC.63.044012

©2001 American Physical Society

Authors & Affiliations

Jung-Hwan Jun*

  • Department of Physics, Chung-Ang University, Seoul 156-756, Korea

  • *Electronic address: jhjun@cau.ac.kr

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Issue

Vol. 63, Iss. 4 — April 2001

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