Factorization Contributions and the Breaking of the $ΔI=1/2$ Rule in Weak $ΛNρ$ and $ΣNρ$ Couplings

Details Factorization Contributions and the Breaking of the $ΔI=1/2$ Rule in Weak $ΛNρ$ and $ΣNρ$ Couplings Factorization Contributions and the Breaking of the $ΔI=1/2$ Rule in Weak $ΛNρ$ and $ΣNρ$ Couplings

1995-04-07

arxiv.org/abs/nucl-th/9504006v1

Phys.Rev.C51:1576-1579,1995

Physics

Nuclear Physics

Nuclear Theory

13 pages, uses REVTEX Entire manuscript available as a ps file at http://www.physics.adelaide.edu.au/theory/home.html . Also a

Scientific paper

10.1103/PhysRevC.51.1576

We compute the modified factorization contributions to the $\Lambda\rightarrow N\rho$ and $\Sigma\rightarrow N\rho$ couplings and demonstrate that these contributions naturally include $\Delta I=3/2$ terms which are comparable ($\simeq 0.4$ to $-0.8$ times) in magnitude to the corresponding $\Delta I=1/2$ terms. As a consequence, we conclude that models which treat vector meson exchange contributions to the weak conversion process $\Lambda N\rightarrow NN$ assuming such weak couplings to satisfy the $\Delta I=1/2$ rule are unlikely to be reliable.

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