Abstract
We calculate the double spin asymmetry of the diffractive Q $$\bar Q$$ and vector meson leptoproduction at COMPASS energies. We analyze dependences of the asymmetry on the structure of the Pomeron-proton coupling. It is shown that it is difficult to study the spin structure of the Pomeron coupling with the proton from the A ll asymmetry. The A lT asymmetry might be an appropriate object for this investigation.
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