Width of the exotic X-b(5568) state through its strong decay to B-s(0)pi(+)

The width of the newly observed exotic state X-b(5568) is calculated via its dominant strong decay to B-s(0)pi(+) using the QCD sum rule method on the light cone in conjunction with the soft-meson approximation. To this end, the vertex XbBs pi is studied and the strong coupling gX(b)B(s)pi is computed employing for X-b(5568) state the interpolating diquark-antidiquark current of the [su][(b) over bar(d) over bar] type. The obtained prediction for the decay width of X-b(5568) is confronted and a nice agreement found with the experimental data of the D0 Collaboratio.