The gauge model of quark--meson interactions and the Higgs status of scalar mesons

Abstract

Electromagnetic and strong hadron processes at low energies are considered in the renormalizable model with the spontaneously broken $U_0(1)\times U(1)\times SU(2)$ gauge symmetry. Calculated radiative widths of vector mesons and effective couplings $g_{VVS}$ agree with the experimental data. Residual Higgs degrees of freedom are associated with scalar states $a_0(980)$ and $f_0(980)$ with the degeneration in masses. Two-gamma decays of ${\pi }^0-$ and $\sigma -$ mesons are analyzed in detail. To provide an "infrared confinement" a cutoff procedure has been also used in calculations.

Comments: 8 pages, 1 figure