The $ΛΛ\to YN$ Weak Transition in Double-$Λ$ Hypernuclei

Details The $ΛΛ\to YN$ Weak Transition in Double-$Λ$ Hypernuclei The $ΛΛ\to YN$ Weak Transition in Double-$Λ$ Hypernuclei

2003-06-24

arxiv.org/abs/nucl-th/0306067v1

Nucl.Phys. A726 (2003) 349-355

Physics

Nuclear Physics

Nuclear Theory

9 pages

Scientific paper

10.1016/j.nuclphysa.2003.07.008

We calculate the $\Lambda \Lambda \to YN$ transition rate of ${^{\phantom{\Lambda}6}_{\Lambda \Lambda}}$He by the hybrid picture, the $\pi$ and $K$ exchanges plus the direct quark processes. It is found that the hyperon-induced decay is weaker than the nucleon-induced decay, but the former may reveal the short-range mechanism of the weak transition and also give a clear signal of the strong $\Delta I=3/2$ transition. The $\Lambda \Lambda \to Y N$ transition in double-$\Lambda$ hypernucleus is complement to the $\Lambda N \to NN$ transition as it occurs only in the J=0 channel, while the J=1 transition is dominant in the $\Lambda N \to NN$ case.

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