https://doi.org/10.1140/epja/i2017-12201-2
Regular Article - Theoretical Physics
Resonance X(5568) as an exotic axial-vector state
1
Institute for Physical Problems, Baku State University, Az-1148, Baku, Azerbaijan
2
Department of Physics, Doğuş University, Acibadem-Kadiköy, 34722, Istanbul, Turkey
3
Department of Physics, Kocaeli University, 41380, Izmit, Turkey
* e-mail: kazizi@dogus.edu.tr
Received:
28
November
2016
Accepted:
1
January
2017
Published online:
23
January
2017
The mass and meson-current coupling constant of the resonance 
, as well as the width of the decay 
are calculated by modeling the exotic X(5568) resonance as a diquark-antidiquark state 
with quantum numbers 
. The calculations are made employing QCD two-point sum rule method, where the quark, gluon and mixed vacuum condensates up to dimension eight are taken into account. The sum rule approach on the light-cone in its soft-meson approximation is used to explore the vertex 
and extract the strong coupling 
, which is a necessary ingredient to find the width of the 
decay process. The obtained predictions are compared with the experimental data of the D0 Collaboration, and results of other theoretical works.
© SIF, Springer-Verlag Berlin Heidelberg, 2017
