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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)
Author(s):
 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
Abstract:
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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