[Clascomment] OPT-IN:Absorption of the omega and phi Mesons in Nuclei

[Daniel Carman]

					Apr. 19, 2010


Dear Mike et al.,

I have read through the meson absorption paper and pass along my
comments to you below. Let me know if you have any questions.


			   Regards,

				  Daniel

********************************************************************
General.
  - Use units of c=1 as you are not consistent in this manuscript.
  - Put references in the order cited in the paper.

Page 2.
  Abstract.
    Line 2. Use \"... mesons were photoproduced from ...\".
  Left column.
    Line 86. Use \"... $omega$, and $\\phi$ ...\".
  Right column.
    Line 111. Use \"... $\\pi \\rho$ pair, where both ...\".
    Line 117. Use \"... which is discussed ...\".
    Line 120. Use \"... \\Gamma_{coll}$, where $\\Gamma_0$ ...\".
    Line 123. I suggest \"... effective density of the medium, ...\".
    Line 130. Use \"... disagree on the measured ...\".

Page 3.
  Left column.
    Line 132. Use \"12-GeV proton\".
    Line 136. Use \"... measurement, the $\\rho ...\".
    Line 152. What width are you talking about here? Total, natural,
      collisional broadened?
    Line 152. Use \"... which corresponds to ...\".
    Line 156. Use \"... in Hall B. CLAS is ideal ...\".
    Line 176. Here it sounds like you purposefully made the widths
      different from target to target. I suggest \"... with up to 10\\%
      deviations between ...\".
  Right column.
    Line 188. Use \"... been reconstructed ...\".
    Line 195. Use \"... shows the mass spectrum ...\".
    Line 196. Use \"... the subtraction, ...\".
    Line 198. Use \"... figure shows the ...\".
    Line 209. Acceptances varied with respect to what? Be specific.
    Line 216. I suggest \"... rapidly with $A$, indicating ... in-medium
      width with increasing target atomic mass.\".
    Line 220. Use \"... by their difference ...\".
    Line 221. Use \"... radial position $r$ in the target, and by the
      difference in their vertex time $\\Delta t$.\".
    Line 226. Use \"... 0.5\\7.0\\% as a function of $A$, ...\".
    Line 227. Use \"... the highest value.\".
    Lines 229,230. Variations in values with respect to what?
    Line 236. Use \"... calculation was made ...\".

Page 4.
  Fig. 1 caption. I cannot see the red and blue hatching. Too weak. I
    suggest you use gray shaded bands, possibly with different hatching
    styles.
  Figs. 2,3,4. I do not like the way the error bars in these plots are
    displayed. It seems non-standard and confused me throughout. Why
    don\'t you show an inner error bar representing the statistical
    uncertainty and an outer error bar representing the total (stat. +
    sys. added in quadrature) uncertainty. This is more appropriate and
    gives a better visual representation of the total uncertainties.
  Fig. 2 caption. What do you mean by \"upper and lower limits\"?
  Right column.
    Line 250. Use \"Monte Carlo\".
    Line 263. Use \"... observed, which implies ...\".

Page 5.
  Right column.
    Fig. 4 caption.
      Line 4. Use \"... data, while the blue ...\".
      Line 5. Need a ref. for CB-ELSA/TAPS experiment here.
      Line 6. Use \"The legend lists ...\".
    Line 314. The reference to E08-018 is misleading in my opinion. This
      experiment was approved with a C3 designation and may never see the
      light of day. In fact this is likely. This reference makes it seem
      like this experiment will definitely take place.

Page 6.
  Left column.
    Line 331. Use \"[35,36], while our ...\".
    Acknowledgment will have to be updated to reflect the final list of
      folks who sign the paper.
  Right column.
    Ref. 23 not cited in this paper.