Exclusive ρ0 production in polarized DIS at SMC

Preliminary spin cross section asymmetries for exclusive ρ0 lepto-production, μ→ N→ → μ' + N + ρ0 (ρ0 → π+π-), are reported. These asymmetries have been determined for the first time by the Spin Muon Collaboration (SMC) at low Q2 (photoproduction) and at large Q2 (DIS) for different p2T intervals in the kinematic range 0.01 < Q2 < 60 GeV2 and 140 < W2 < 310 GeV2 (< W >≅ 15 GeV) for the full SMC data set. About 100 K ρ0's have been selected for 0.62 < m(π+π-) < 1.07 GeV/c2 and parallel vertical bar parallel < 0.05. Within the statistical precision, no significant asymmetries have been observed at low Q2 in the preliminary results