  To understand the nature of the $X(5568)$, recently observed in the mass
spectrum of the $B_{s}^0\pi^\pm$ system by the D0 Collaboration, we have
investigated, in a previous work, a scalar tetraquark (diquak-antidiquark)
structure for it, within the two-point QCD sum rules method. The result found
for its mass agrees well with the experimental value. Encouraged by this
finding we now extend our calculations to obtain the decay width of $X(5568)$
to $B_{s}^0\pi^\pm$ using the three-point QCD sum rule. We obtain a value of
$(20.4\pm8.7)\MeV$, which, on comparing with the experimental value of
$21.9\pm6.4 (\mbox{sta})^{+5.0}_{-2.5}(\mbox{syst}) \MeV/c^2$, reinforces the
scalar four quark nature of $X(5568)$.
