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Paper   IPM / P / 15099
School of Physics
  Title:   The structure, mixing angle, mass and couplings of the light scalar f0(500) and f0(980) mesons
  Author(s): 
1.  S.S. Agaev
2.  K. Azizi
3.  H. Sundu
  Status:   Published
  Journal: Phys. Lett. B
  Vol.:  781
  Year:  2017
  Pages:   279-282
  Supported by:  IPM
  Abstract:
The mixing angle, mass and couplings of the light scalar mesons f0(500) and f0(980) are calculated in the framework of QCD two-point sum rule approach by assuming that they are tetraquarks with diquark-antidiquark structures. The mesons are treated as mixtures of the heavy |H〉 = ([su][su]+[sd][s d])/√2 and light |L〉 = [ud][u d] scalar diquark-antidiquark components. We extract from corresponding sum rules the mixing angles φH and φL of these states and evaluate the masses and couplings of the particles f0(500) and f0(980).

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