DIS structure functions and the double-spin asymmetry in $ρ^0$ electroproduction within a Regge approach

N. I. Kochelev, K. Lipka, W. -D. Nowak, V. Vento, A. V. Vinnikov

Published 2002-11-08, updated 2002-12-11Version 3

The proton, neutron and deuteron structure functions $F_2(x,Q^2)$ and $g_1(x,Q^2)$, measured at intermediate $Q^2$, 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 $\rho^0$ meson electroproduction on the proton and the deuteron. In this way, the double-spin asymmetry observed at HERMES in $\rho^0$ electroproduction on the proton, can be related to the anomalous behavior of the flavor-singlet part of the spin-dependent structure function $g_1(x,Q^2)$ at small $x$.