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

TL;DR

This paper calculates the mass and decay constant of the newly observed exotic $X(5568)$ state using the two-point sum rule method, aligning well with experimental measurements.

Contribution

It provides a theoretical calculation of the $X(5568)$ properties using QCD sum rules with higher-dimensional condensates, offering insights into its structure.

Findings

Mass result agrees with experimental data

Decay constant computed within QCD sum rules

Inclusion of up to eight-dimensional condensates

Abstract

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.