[Clascomment] Sebastian's comments

[Silvia Niccolai]

Dear Sebastian,
I received a scanned copy of your comments on our PRL draft directly from 
Hawaii, thank you very much for them.
For the sake of our Ad Hoc committee, I posted it to the following link:
http://www.jlab.org/Hall-B/secure/eg1-dvcs/silvia/drafts/prl_sebastian.pdf

Here are our replies/questions, as your handwriting is not always clear to 
me ;-) . Please assume that whatever is not commented here below has been 
accepted and done as you suggested:

- I don't understand your remarks on our abstract: you don't like "For the 
first time" at the opening of the sentence? Please clarify. And as far as 
the capital letters for Deeply and Virtual, we don't use them HERE, 
following the choice done in F.X. Girod's paper, and in others.

- Page 1, second column: "with respect to its direction" was included on 
request of our Ad Hoc committee.

- Page 2, the part introducing the CFFs has now been modified (you'll see 
it when the final draft is posted for the author list check), it should 
hopefully be clearer.

- Page 2, I don't think it is necessary to add "lepton" for the beam as we 
showed in Fig. 1 that we deal with electroproduction.

- If I read correctly your comments at the side of the first column of 
page 2, you are not satisfied with the link Htilde-axial charge and would 
like further infos about the spin. Maybe you were mislead by our improper 
use of the simplistic definitions "spin-dependent" and 
"spin-independent" GPDs, that we used in the paragraph before to classify 
the four GPDs. The best way to say, as other collaborators have pointed 
out, is to use "quark-helicity (in)dependent". So Htilde depends on the 
quark helicity (as it is a subtraction of two processes with opposite 
quark helicities) but NOT on the spin of the nucleon, which doesn't change 
between the initial and final state. See the attached cartoon for a 
clarification.

- Page 2, second column: we prefer to keep the 5T and the 1K together in 
the same sentence (for which we got feedback from C. Keith) as they are 
both needed to polarize the target.

- I can't decypher your comment near Fig. 2, but anyways this figure has 
been curretnly modified, check out the new version and hopefully you'll 
like it :-)

- Page 3, second column: I can't understand what you suggest to use in 
place of "amplitude". If I recall correctly, this sentence was suggested 
by our Ad Hoc committee.

- Right below, you ask about A_UT: to estimate A_UT we use the predictions 
of the VGG model. A detailed description of this correction (as well as a 
table of its really small values) is included in the long paper which 
we'll publish shortly after this one (it is half way through Ad Hoc right 
now).

- Page 4, second column: in the literature I seem to find more "moment in 
x" than the "moment over x" that you suggest.

- Page 5: I can't read your suggestion after "For the first time".

- The dictionary says that "dominate" can be used as a transitive verb, 
so I think that "over" is not necessary.

Thank you again for your comments and best regards,
Silvia
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