Comparing the Broken U3xU3 Linear Sigma Model with Experiment. U3xU3

Details Comparing the Broken U3xU3 Linear Sigma Model with Experiment. U3xU3 Comparing the Broken U3xU3 Linear Sigma Model with Experiment. U3xU3

1999-05-10

arxiv.org/abs/hep-ph/9905282v2

Eur.Phys.J.C11:359-363,1999

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages revtex, 1 figure, 2 tables, minor corrections, To appear in Eur. Phys. Journal C

Scientific paper

10.1007/s100520050641

The linear sigma model with broken U3xU3 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 tri-linear couplings of lightest scalars, taken as a0(980), f0(980), sigma(500) and K*0(1430). This clearly indicates that these scalars are the chiral partners of the pi, eta, eta', K and strongly suggests that they like the latter are (unitarized) quark-antiquark states.

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