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Resonance X(5568) as an exotic axial-vector state

  • S. S. Agaev
  • K. AziziEmail author
  • B. Barsbay
  • H. Sundu
Regular Article - Theoretical Physics

Abstract.

The mass and meson-current coupling constant of the resonance \(X(5568)\), as well as the width of the decay \(X(5568)\rightarrow B_{s}^{\ast}\pi\) are calculated by modeling the exotic X(5568) resonance as a diquark-antidiquark state \(X_{b}=[su][bd]\) with quantum numbers \(J^{P}=1^{+}\). 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 \(X_{b}B_{s}^{\ast}\pi\) and extract the strong coupling \(g_{X_{b}B_{s}^{\ast}\pi}\), which is a necessary ingredient to find the width of the \(X_{b}\rightarrow B_{s}^{\ast}\pi^{+}\) decay process. The obtained predictions are compared with the experimental data of the D0 Collaboration, and results of other theoretical works.

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Copyright information

© SIF, Springer-Verlag Berlin Heidelberg 2017

Authors and Affiliations

  1. 1.Institute for Physical ProblemsBaku State UniversityBakuAzerbaijan
  2. 2.Department of PhysicsDoğuş UniversityIstanbulTurkey
  3. 3.Department of PhysicsKocaeli UniversityIzmitTurkey

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