DIS structure functions and the double-spin asymmetry in ρ electroproduction within a Regge approach

The proton, neutron and deuteron structure functions F2(x,Q 2) and g1(x,Q 2), measured at intermediate Q2, are analyzed within a Regge approach. This analysis serves to fix the parameters of this scheme which are then used to calculate, in a unified Regge approach, the properties of ρ0 meson electroproduction on the proton and the deuteron. In this way, the double-spin asymmetry observed at HERMES in ρ0 electroproduction on the proton, can be related to the anomalous behavior of the flavor-singlet part of the spin-dependent structure function g1(x,Q 2) at small x.