Relative strength of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>W</mml:mi></mml:math>exchange and factorization contributions in hadronic decays of charmed baryons

Abstract

The nonleptonic decays ${\ensuremath{\Lambda}}_{c}^{+}\ensuremath{\rightarrow}{\ensuremath{\Delta}}^{++}{K}^{\ensuremath{-}},{\ensuremath{\Sigma}}^{*0}{\ensuremath{\pi}}^{+}$, and ${\ensuremath{\Xi}}^{*0}{K}^{+}$ and ${\ensuremath{\Omega}}_{c}^{0}\ensuremath{\rightarrow}{\ensuremath{\Xi}}^{0}{\overline{K}}^{0}$, ${\ensuremath{\Omega}}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}$, and ${\ensuremath{\Xi}}^{*0}{\overline{K}}^{0}$ are studied. The dominant contribution for the former decays comes from the $W$ exchange and for the latter decays the $W$ emission gives the dominant contribution. These decays are especially suitable to determine directly the scale of $W$ exchange and $W$ emission from the experimental data. We obtain $\ensuremath{\alpha}({\ensuremath{\Omega}}_{c}^{0}\ensuremath{\rightarrow}{\ensuremath{\Xi}}^{0}{\overline{K}}^{0}\ensuremath{\approx}0.35$.