Production rho(770) of Meson Pairs in the Decays rho(1450) - rho(770)eta and tau - rho(770)eta nu(tau) and in the Process e(+)e(-) - rho(770)eta in the Extended Nambu-Jona-Lasinio Model

摘要

The production of rho(770)eta meson pairs in electron-positron collisions and in the decays rho(1450) - rho(770)eta and tau - rho(770)eta nu(tau) is calculated in the framework of the extended Nambu-Jona-Lasinio model. The contributions with intermediate rho mesons in both the ground and first radially excited states are taken into account when calculating processes associated with electron-positron annihilation and decay of the tau lepton. The width of the decay tau - rho(770)eta nu(tau) is theoretically estimated. The results obtained for other processes are consistent with the existing experimental data.