ar X iv : h ep - p h / 99 05 28 2 v 2 9 J ul 1 99 9 Comparing the Broken U 3 × U 3 Linear Sigma Model with Experiment
نویسنده
چکیده
The linear σ model with broken U3×U3 is compared with data on the lightest scalar and pseudoscalar mesons. When 5 of the 6 parameters are fixed by the pseudoscalar masses and decay constants one finds that, already at the tree level, a reasonable description for the 4 scalar masses, mixing and up to 8 trilinear couplings of lightest scalars, taken as a0(980), f0(980), σ(≈ 500) and K 0 (1430). This clearly indicates that these scalars are the chiral partners of the π, η, η, K and strongly suggests that they like the latter are (unitarized) qq̄ states.
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ar X iv : h ep - p h / 99 05 28 2 v 1 1 0 M ay 1 99 9 Comparing the Broken U 3 × U 3 Linear Sigma Model with Experiment
The linear σ model with broken U3×U3 is compared with data on the lightest scalar and pseudoscalar mesons. When 5 of the 6 parameters are fixed by the pseudoscalar masses and decay constants one finds that, already at the tree level, a reasonable description for the 4 scalar masses, mixing and up to 8 trilinear couplings of lightest scalars, taken as a0(980), f0(980), σ(≈ 500) and K 0 (1430). T...
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