Pentaquark antidecuplet
= Pentaquark antidecuplet
{title2=$\overline{\mathbf{10}}$}
Two antisymmetric flavour quark pairs can each transform in $\overline{\mathbf3}$, combine into $\overline{\mathbf6}$, and with an <antiquark> give $\overline{\mathbf6}\otimes\overline{\mathbf3}=\overline{\mathbf{10}}\oplus\mathbf8$. The antidecuplet rows are $(Y,I)=(2,0),(1,1/2),(0,1),(-1,3/2)$. Exactly three weights are absent from all three-quark states: $(I_3,Y)=(0,2)$ and $(\pm3/2,-1)$.