  Two-photon decays of rho and omega mesons and strong decays rho -> eta pi and
omega -> pi pi are described in the quark Nambu-Jona-Lasinio(NJL) model in
dense medium. Decays of rho-meson are especially interesting because they
contain intermediate a_0-meson which became a sharp resonance in the vicinity
of phase transition of hadron matter into quark-gluon plasma. This leads to
increasing rho decay width and, as a result, two-photon decay of rho-meson in
medium became comparable with two-photon decays of scalar and pseudoscalar
mesons in vacuum. Similar effect take place in the strong decay rho -> eta pi.
