The strong decays of the light scalar mesons f0(500) and f0(980)

Abstract

The partial width of the decay channels f0(500)→ππ f0(980)→ππ and f0(980)→KK¯ are calculated using QCD light-cone sum rules method and a technique of the soft meson approximation. The scalar particles 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. Obtained results for the full width of the f0(500) meson Γth.=434.7±72.3MeV and for the f0(980) meson Γth.=42.12±6.70MeV are compared with the world averages for these parameters, and a reasonable agreement between them is found.