**************************************************************
*
* 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