[Clascomment] OPT-IN:First Measurements of the Double-Polarization Observables F, P, and H in omega Photoproduction on Transversely-Polarized Protons in the N* Resonance Region

[Daniel Carman]

Dear Priyashree, Volker et al:

I have read through your draft paper on the omega meson photoproduction
spin observables from the FROST experiment and include my comments below. 
In general, this paper was well constructed, the presentation is well thought out,
and the data are very nice. If you have any questions on my comments below, let
me know. 

Regards,
Daniel

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General:
 - A quirk in English style, but you should not use a hyphen between words where the
   first word ends in "ly". So, for example, use "circularly polarized beam" and not
   "circularly-polarized beam".
 - Throughout you put a spurious space between a value and the % sign. Use e.g. "85%"
    and not "85 %".

Page 1:
 - Abstract.
  - Line 5. Use "... have been measured using linearly ...".
 - Left column.
  - Paragraph 2.
    - Line 2. Use "... observables $F$, $P$, and $H$ ..." (to match order in title).
    - Eq.(1). No proton in omega decay.
 - Right column.
  - Paragraph 3.
    - Line 1. Use "The CEBAF accelerator facility at Jefferson Lab delivered ...".
  - Paragraph 4.
    - Line 9. Use "... and was observed to vary ...".

Page 2:
 - Left column.
   - Paragraph 1.
     - Line 2. Use "... an average degree of polarization of 81\% ...".
     - Line 4. Use "... pointing away from (towards) ...".
     - Line 11. Use "... allowing for a clean ...".
   - Paragraph 2.
     - Line 1. Use "The CLAS detector, with ...".
     - Line 6. Use "... time-of-flight (TOF) scintillators.".
     - Line 8. Use "Full details of the CLAS detector are provided in ...".
   - Paragraph 3.
     - Line 7. Use ".. event that had ...".
     - Line 13. Use "... using the TOF, $\beta_{TOF}$."
 - Right column.
  - Paragraph 1.
    - Line 1. Use "... on good agreement of $\beta_{DC}$ and $\beta_{TOF}$ ...". 
    - Line 5. Use "... magnitudes, which are discussed ...".
  - Paragraph 2.
    - Line 5. Use "... kinematically fit, and ...".
  - Paragraph 3.
    - Line 4 after Eq.(3). Here you use "Eqn. 3". Five lines later you use "Eq. 2". Use a consistent style.
    - Line 5 after Eq.(3). What is meant by the obtuse "polarization configuration"?
    - Line 7 after Eq.(3). This final sentence of the paragraph needs a reference point to an analysis note.
  - Paragraph 4.
    - Line 6. Use "... observables did not converge.".
    - Line 7. Use "... corresponding to the different orientations ...".
    - Line 8. Use "... polarization, were combined with ...".

Page 3:
  - Left column.
   - Paragraph 1.
     - Last sentence. What is meant by "fraction uncertainties"? Do you mean scale-type uncertainties?
   - Paragraph 2.
     - Line 6. "... energy range 1200-2400 MeV ..." does not agree with the range in the abstract.
   - Paragraph 3.
     - Line 5. Use "... only on differential cross section data, and ...".
   - Paragraph 4.
     - Line 10. Use "... as the solid and dashed lines, ...".
   - Paragraph 5.
     - Line 2. Use "... analysis that is discussed ...".
  - Right column.
   - Fig. 2 caption.
     - Line 2. Use "... asymmetry $F$ in $\vec{\gamma} \vec{p} \to p \omega$.
     - Line 8. Use "... solid and red dashed curves ...".
   - Paragraph 1.
     - Line 10. Use "... $F$, $H$, $P$, and $T$."
   - Paragraph 2.
     - Line 3. Use "... amplitudes that were reported ...".
     - Line 4. Use "... 1800 MeV that is identified ...".

Page 4:
  - Fig. 3 caption.
    - Line 4. Use "... blue solid and red dashed ...:,
- Left column.
  - Paragraph 1.
    - Line 9. Use "... of the non-resonant amplitudes.". 

Page 5:
 - Ref. [12]. Use "Y.S. Oh".
 - Ref. [17] is a CLAS Collaboration paper.
 - Ref. [19]. This is far too unwieldy!
 - Ref. [26] is listed out of order. It should go before Ref. [20].