Identifying the quark content of the isoscalar scalar mesons f 0 ( 980 ) , f 0 ( 1370 ) , and f 0 ( 1500 ) from weak and electromagnetic processes
نویسندگان
چکیده
The assignments of the isoscalar scalar mesons f0(980), f0(1370), and f0(1500) in terms of their q̄q substructure is still a matter of heated dispute. Here we employ the weak and electromagnetic decays D+ s → f0π and f0 → γγ, respectively, to identify the f0(980) and f0(1500) as mostly s̄s, and the f0(1370) as dominantly n̄n, 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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