[Clascomment] OPT-IN:Deeply Virtual Compton Scattering measurement off bound protons

[Daniel Carman]

Dear Mohammad et al,

I have read through the draft of your DVCS paper and include my comments below. If you
have any questions, let me know.

Regards,
Daniel
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Page 1:
 - Abstract:
   - Line 4. Use "... azimuthal angle ...".
   - Line 5. Use "... of the beam spin asymmetry (BSA) was ..."
   - Line 6. Use "$Q^2$".
   - Line 9. Use "... and for exploring the origin ...".
 - Line 36. Use "... a three-dimensional (3-D) ..."
 - Line 38. Use "The measurement of free proton DVCS has been ...".
 - Line 45. Use "... similar 3-D picture of the ...".
 - Line 46. Use "... case, however, two ...".
 - Line 65. Use "Fig. 1".
 - Line 67. Use "i.e.".

Page 2:
 - Fig. 1 caption.
   - Line 5. Use "... is the nucleon longitudinal ...".
 - Line 72. Use "chirally even".
 - Eq. (1). Use comma after equation, not a period.
 - Line 84. Use "... is the virtual photoproduction differential cross section ...".
 - Eq. (2). Add a comma after the equation.
 - Line 93. Use "abovementioned".
 - Eq. (3). Add a comma after the equation.
 - Line 103. Use "... where $\xi$ is the ...".
 - Line 105. Use "Similar expressions apply for the GPDs ...". Provide a reference here.
 - Line 108. Use "longitudinally polarized".
 - Line 113. Use "... centered 64~cm upstream ...".
 - Line 115. Use "... [40] was supplemented ...".
 - Line 117. Use "The IC extended ...".
 - Line 123. Use "beamline".
 - Line 138. Use "... timing cut was used to separate the EC ...".
 - Line 142. Use "... photons were mostly soft ..."

Page 3:
 - Line 144. Use "... cuts easily eliminated.".
 - Line 145. Use "... photon was considered ...".
 - Line 146. Use "... on the particle identification."
 - Line 151. Use "$Q^2$".
 - Line 153. Use "$W$".
 - Line 155. Use "The squared transferred momentum to the recoil proton $t$, calculated from the
     four-momentum vectors of the incoming ...".
 - Line 158. Use "... at a given $Q^2$ and $W$ ...".
 - Line 161. Use "specifically used the ...".
 - Line 173. Use "Fig. 2".
 - Line 178. Use "... and we saw no sizable effect that could be ...".
 - Line 183. Use "Fig. 3".
 - Line 184. Use "... that contributed ...".
 - Line 187. Use "... escapes detection.".
 - Line 190. Use "... to be 6.5\% by ...".
 - Line 195. Use "... that were wrongly identified ...".
 - Fig. 2 caption.
   - Line 2. Use "... to bottom are: ...".
   - Line 7. Use "... event candidates ..."
   - Line 8. Use "... events that passed ...".
   - Line 9. Use "... all of these cuts ...".
 - Line 199. Use "... events were calculated as ...".

Page 4:
 - Line 203. Use "... to be 8 to 10\%".
 - Eq. (6). Equation should end with a comma, not a period.
 - Line 206. Use "... DVCS events for the positive ...".
 - Line 207. Use "... beam-helicity states, ...".
 - Line 215. Use "... $a_0$ term dominates the shape ...".
 - Line 220. Use "Fig. 4".
 - Line 222. Use "... integrated over the full ...".
 - Line 223. Use "... integrated over the full  ... integrated over the full ...".
 - Line 225. Use "sin" and "cos" should be in rm font. In latex use "\sin" and "\cos" in math mode.
 - Line 230. Use "statistical uncertainties".
 - Line 231. Use "Fig. 5".
 - Line 233. Use "Fig. 4".
 - Line 234. Use "... does not show a strong ...".
 - Line 236. Use "... are compared to the theoretical ...".
 - Line 238. Use "Their model used a nuclear spectral function and considers mainly off-shell effects." This
     is a statement of jargon that is not appropriate for the general PRL audience. Please reconsider.
 - Line 243. Use "... effects that are not taken ...".
 - Line 245. Use "... knocked-out proton ...".
 - Line 246. Use "On the graph for the $-t$ ...".
 - Line 247. Use "HERMES Collaboration".
 - Line 254. Use "... we constructed ...".
 - Fig. 4. The labels are all too small on this plot (axis labels, titles, plot kinematic labels)
 - Fig. 4 caption.
   - Line 2. Use "(top row)".
   - Line 3. Use "(middle row)" and "(bottom row)".
   - Line 7. "sin" and "cos" should be in rm font. In latex use "\sin" and "\cos" in math mode.
 - Line 255. Use "Fig. 6".
 - Line 259. Use "... lower asymmetries that are independent of ...".
 - Line 262. Use "medium-modified".
 - Line 268. Use "... will be important to differentiate ...".
 - Line 273. Use "Our results are compared ...".

Page 5:
 - Fig. 5 caption.
   - Line 5. Use "On the middle plot the curves ...".
   - Line 6. Use "On the bottom plot the solid ...".
   - Line 8. It is not clear what you mean by "enriched region".
   - Line 8. Use "... [30]; the curves represent ...".
 
References:
 - End the following references with a period: [2], [28], [29], [30], [31], [32], [33], [34], [38].
 - Ref. [40] is not a CLAS Collaboration paper.
 - Refs. [42] and [43] are not cited in the paper.