Identifying the quark content of the isoscalar scalar mesons f_0(980), f_0(1370), and f_0(1500) from weak and electromagnetic processes

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  • 19 September 2001
Abstract
The assignments of the isoscalar scalar mesons f_0(980), f_0(1370), and f_0(1500) in terms of their \bar{q}q substructure is still a matter of heated dispute. Here we employ the weak and electromagnetic decays D_s^+ \to f_0 \pi^+ and f_0 \to \gamma\gamma, respectively, to identify the f_0(980) and f_0(1500) as mostly \bar{s}s, and the f_0(1370) as dominantly \bar{n}n, in agreement with previous work. The two-photon decays can be satisfactorily described with quark as well as with meson loops, though the latter ones provide a less model-dependent and more quantitative description.

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