OPT-IN:Target and Double Spin Asymmetries of Deeply Virtual Ï0 Production with a Longitudinally Polarized Proton Target and CLAS

[Victor Mokeev]

  Dear Colleagues,

 Your paper is very nice and very needed in order to get access to the structure of the ground nucleon state in 3D and offer valuable constraints for the subsequent studies of excited nucleon state structure in terms of the transition N-->N* form factors.

 However I would propose to re-write the part:

p.4 left strings 278-282

How we may claim the GGL (not GL to be consistent with the previous text)) is in ``fair agreement" with the measured asymmetries, if three of four measured asymmetries are very different from both model predictions, up to factor of 3 at t>1.0 GeV^2, as it can be seen in Fig . 4.?

In my view, these discrepancies may be the evidence for the contributions from other than hand-bag diagrams, because of interference between hand-bag and other than hand-bag diagrams. Can you rule out this opportunity?