Answer
For combination $uus$, we have $$Q=+\frac{2}{3}+\frac{2}{3}-\frac{1}{3}=1 $$
and $$S=0+0-1=-1 . $$ Therefore this is $\Sigma^{+}$ particle.
Work Step by Step
For combination $uus$, we have $$Q=+\frac{2}{3}+\frac{2}{3}-\frac{1}{3}=1 $$
and $$S=0+0-1=-1 . $$ Therefore this is $\Sigma^{+}$ particle.
