| Vector mesons as phi, omega, J/psi, with Jexp(PC) = 1-- are produced at colliding electron-positron high
energy beams through the annihilation and the scattering channels. We consider here the scattering
mechanism, namely the creation of a vector meson in the fragmentation region of one of initial
leptons. It corresponds to the kinematics where the vector meson is emitted close to the direction
of one of the colliding leptons, the direction of the other lepton keeping close to the initial one. The
annihilation channel contribution enhanced by the initial hard photon emission mechanism occurs
in the kinematical region where the final particles are emitted at large angles and plays the role
of background. Differential distributions of the energy fraction and of the transversal component
of the vector meson are calculated. The relevant formalism and the numerical estimations are
presented. |
