Mass and decay constant of the newly observed exotic $X(5568)$ state

Understand

The mass and decay constant of the $X(5568)$ state newly observed by D0 Collaboration are computed within the two-point sum rule method using the diquark-antidiquark interpolating current.

• In calculations, the vacuum condensates up to eight dimensions are taken into account.
• The obtained result for the mass of the $X(5568)$ state is in a nice agreement with the experimental data.