[Clascomment] OPT-IN:Measurements of $gamma_{v} p ightarrow p' pi^{+} pi^{-}$ cross section with the CLAS detector for $0.4 GeV^{2} < Q^{2} < 1.0 GeV^2$ and $1.3 GeV < W <1.825 GeV$

[David Ireland]

Dear Gleb, et al.,

I have just a few comments on the draft paper, which looks to be in good shape:

- line 24: referencing the CLAS technical paper is better left to the experimental section; it is more important to reference some physics results, such as the previous measurements that are described.

- lines 34-37: again, these sentences belong in the experimental section 

- figure 15: This figure is a little confusing. Is it not enough to simply state that cells with $\delta\epsilon/\epsilon$ greater than 0.3 were not included because of concern over statistical accuracy?

- line 799-802: I am not sure that, just because an approach for describing radiative processes in exclusive double-pion electroproduction is not available, it follows that a simpler assumption is adequate.

Some re-wording maybe better, what about "The latter assumption is necessary, since approaches that are capable of describing radiative processes in double-pion electroproduction are not yet available."


Cheers,

Dave