************************************************************** * * Paper : Diffractive Electroproduction of rho and phi Mesons * at HERA, DESY 09-093 * Reac : GAMMA* P --> RHO0 P(or Y) * Caption : Ratios of the helicity amplitudes (taken to be purely imaginary) * and phase difference between the T11 and T00 amplitudes * (the amplitude ratios T10/T00 and T-11/T00 and the phase * difference phi01 -phi00 are taken to be 0) * for rho meson production, computed from global * fits to the measurements of the 15 spin density matrix * elements, as a function of M (NPE is assumed), * separately for 2.5