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Paper   IPM / Particles And Accelerator / 16319
School of Particles and Accelerator
  Title:   New scalar resonance X0(2900) as a D*K* molecule: Mass and width
1.  S. S Agaev
2.  Kazem Azizi
3.  H Sundu
  Status:   Published
  Journal: J. Phys. G: Nucl. Part. Phys
  No.:  085012
  Vol.:  48
  Year:  2021
  Supported by:  IPM
We explore features of the scalar structure X0(2900), which is one of the two resonances discovered recently by LHCb in the DK+ invariant mass distribution in the decay B+D+DK+. We treat X0(2900) as a hadronic molecule composed of the conventional mesons D*0 and K*0 and calculate its mass, coupling and width. The mass and coupling of X0(2900) are determined using the QCD two-point sum rule method by taking into account quark, gluon, and mixing vacuum condensates up to dimension 15. The decay of this structure to final state DK+ is investigated in the context of the light-cone sum rule approach supported by a soft-meson technique. To this end, we evaluate strong coupling G corresponding to vertex X0DK+, which allows us to find width of the decay X0(2900) → DK+. Obtained predictions for the mass of the hadronic molecule D* K* m=(2868 ±198) MeV and for its width Γ = (49.6 ±9.3) MeV can be considered as arguments in favor of molecule interpretation of X0(2900).

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