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Paper   IPM / Physic / 15197
School of Physics
  Title:   The nonet of the light scalar tetraquarks: the mesons a0(980) and K0(800)
1.  S.S. Agaev
2.  K. Azizi
3.  H. Sundu
  Status:   Published
  Journal: Phys. Lett. B
  Vol.:  789
  Year:  2019
  Pages:   405-412
  Supported by:  IPM
The spectroscopic parameters and partial decay widths of the light mesons a0(980) and K0(800) are calculated by treating them as scalar diquark-antidiquark states. The masses and couplings of the mesons are found in the framework of QCD two-point sum rule approach. The widths of the decay channels a0(980) → ηπ and a0(980) → K K, and K0(800) → K+ π and K0(800) → K0π0 are evaluated using QCD sum rules on the light-cone and technical tools of the soft meson approximation. Our results for the mass of the mesons ma0=991+29−27  MeV and mK=767+38−29 MeV, as well as their total width Γa0=60.75±13.72 MeV and ΓK0=401.1±87.1MeV are compared with last experimental data.

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