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|Paper IPM / Physic / 15099||
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][―s―u]+[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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