Two photons decay of the glueball and scalar isoscalar mesons in a scaled NJL model
Abstract
We use a modified version of the Nambu--Jona-Lasinio model which implements the QCD trace anomaly to calculate the two photons decay width of the glueball (f0(1500)) and of the two scalar mesons (f0(1370), fJ=0(1710)) to which it is mixed. We investigate the effect of this mixing over the coupling constants of the f0 states to the quarks.
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