[Clascomment] OPT-IN:Target and Beam-Target Spin Asymmetries in Exclusive pi+ Electroproduction for Q2 > 1 GeV2

[Daniel Carman]

Peter et al.,

I have read through the draft of your latest paper on the piN asymmetries for 
larger Q2 and include my comments below. This paper was very enjoyable to read,
your main points clearly stated, and it was remarkably free of jargon. Nicely 
done. Let me know if you have any questions.


					        Regards,
						
						Daniel

************************************************************************************
General:
 - Throughout you use the words "error" and "errors" when I would prefer you use the words
   "uncertainty" and "uncertainties".
 - The capitalization of section and subsection headings is not done consistently in
   the paper.

Page 1:
 - Abstract.
    - Line 2. Use "... from the scattering of 6~GeV ...".

Page 2:
 - Line 25. I suggest "Beam asymmetries at large $Q^2$ for $\pi^+n$ electroproduction
     from a proton target were published ...".
 - Line 27. Use "... were reported from the "eg1a" and "eg1b" experiments at ..."

Page 3:
 - Add a comma at the end of the last equation ($\sigma_0$) for proper punctuation.

Page 4:
 - Line 49. You state at you measured ALL and AUL after defining three asymmetries in
    Eq.(1). Then you add, almost parenthetically, that you did not measure ALU even
    though you had the data. I think that you should make an explicit statement why
    you did not measure ALU.
 - Line 61. Use "The 1.5-cm-diameter target cups ...".

Page 5:
 - Lines 72,73. The proper abbreviation for milliradians is "mrad" not "mr".
 - Line 84. Use "Part A (early 2009) used targets centered ...".
 - Line 85. Use "... upstream of the CLAS center ...".
 - Line 86. Use "... 10~cm upstream to $z_0 ...".
 - Line 91. This sentence, "Additional information ..." should be included in the 
    previous paragraph.
 - Table I. Capitalize column headings.

Page 6:
 - Line 106. Use "... events was subsequently ...".

Page 7:
 - Line 130. Use "... small deposited energy ...".
 - Line 134. Use "... requiring a deposited energy of ...".

Page 9:
 - Line 176. Use "In the topology $ep \to e\pi^+n$, cuts on ...".

Page 10:
 - Line 180. No comma after "in-plane direction".
 - Line 183. Use "... compared to the peaks ...".

Page 12:
 - Line 200. Use "... of the spin asymmetries ...".

Page 14:
 - Add commas after Eq.(4) and Eq.(5) for proper punctuation.
 - Line 206. Use "... the number of events in ...".

Page 15:
 - Line 229. Use "... carbon target was about ...".
 - Line 249. Use "neutron" not "neuron".

Page 16:
 - Fig. 6. Please label the $Q^2$ values of the curves. I suggest adding a key and using
   different color for the curves. Also, give the value of cos(th).
 - Line 260. Use "... in forming the asymmetries, ...".
 - Line 261. Remove the comma after "compatible".
 - Line 262. Remove the comma after "asymmetries".

Page 18:
 - Please state what the error bars are on your plots. Total or statistical only.

Page 19:
 - Line 296. Use "... in the target composition ... to about a 2.5\% ...".
 - Line 302. Use "... spectra; the value that gives ...".

Page 20:
 - Line 329. Use "... $Q^2$ data and in Fig. 9 ...".
 - Line 339. Use "... can be seen, with a noticeable ...".

Page 22:
 - Figs. 8, 9, 10, 11.You should say which topology is represented.
 - Fig. 8 caption.
   - Lines 3, 4. Replace semicolons with commas.
   - Line 4. Use "... short-dashed curves are for the GPD-inspired ...".

Page 24:
 - Fig. 10 caption.
   - Lines 3, 4. Replace semicolons with commas.
   - Line 4. Use "... short-dashed curves are for the GPD-inspired ...".

Page 25:
 - The names in the first two lines of the acknowledgments should be listed consistently.
   Either all first names or all first initials.

Page 26:
 - Line 394. Who was supported by an Emmy Noether grant? This may be a left-over from a
   collaborator who is no longer part of us.

References:
 - [6]. Should be "... {\bf 77}, 015208 ...".
 - [11], [17], [18], [21] have formatting problems.
 - [16]. Use "B.A. Mecking {\it et al.}, ...".