[Clascomment] OPT-IN: Differential cross sections and recoil polarizations for the reaction gamma p --> K^+ Sigma^0

[Marco Mirazita]

page 1, right column
All the second paragraph (from \"In this paper .....) should be moved at the end of the 
theoretical introduction, just before the last paragraph of section I (at page 2, left 
column).

Section III
I would reorganize this section in this way
	A. Fiducial cuts
	B. Timing cuts
	C. Confidence level cut
	D. K+ Lambda removal cut
	E. Total missing mass cut
	F. Effectiveness of the cuts



page 8, second row of eq. 11
A \"cos\" is missing in the arguments of Y

Section VIII
You quote a 7% systematic error from flux normalization, calculated by comparing known 
cross sections with g11 results. But shouldn\'t this be treated as a correction to be 
applied to your data instead of a systematic uncertainty?


Page 19, left column, second paragraph
The structure at 2.2 GeV is visible only for 3 angles between -0.85 and -0.55, it 
disappears above -0.55 and at the most backward angle of -0.9, even if in this case the 
error bars are large. Also its position seems to be shifted by ~100 MeV within the 3 angular bins. Is all that compatible with a resonance? If yes, can you deduce anything 
from the shift of the peak position?


Ref. 37 has been published in Phys. Lett. B 688 (2010) pagg. 289-293