Weak Decay of $Λ$ in Nuclei : Quarks vs Mesons

Details Weak Decay of $Λ$ in Nuclei : Quarks vs Mesons Weak Decay of $Λ$ in Nuclei : Quarks vs Mesons

1999-06-14

arxiv.org/abs/nucl-th/9906036v1

Nucl.Phys. A669 (2000) 331-350; Erratum-ibid. A678 (2000) 455-456

Physics

Nuclear Physics

Nuclear Theory

22 pages, 14 figures

Scientific paper

10.1016/S0375-9474(99)90427-X

Decays of $\Lambda$ in nuclei, nonmesonic mode, are studied by using the $\Lambda N \to NN$ weak transition potential derived from the meson exchange mechanism and the direct quark mechanism. The decay rates are calculated both for the $\Lambda$ in symmetric nuclear matter and light hypernuclei. We consider the exchange of six mesons ($\pi, K, \eta, \rho, \omega, K^\ast$). The form factor in the meson exchange mechanism and short range correlation are carefully studied.

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