Double spin asymmetry in exclusive $\rho^0$ muoproduction at COMPASS

The longitudinal double spin asymmetry A(1)(rho) for exclusive leptoproduction of rho(0) mesons, mu+N ->mu+N+rho, is studied using the COMPASS 2002 and 2003 data. The measured reaction is incoherent exclusive rho(0) production on polarised deuterons. The Q(2) and x dependence of A(1)(rho) is presented in a wide kinematical range, 3x10(-3) rho at small Q(2) (Q(2) < 0.1 (GeV/c)(2) ) and small x (x < 3x10(-3) ). The asymmetry is in general compatible with zero in the whole kinematical range.