OPT-IN: Target and Beam-Target Spin Asymmetries in exclusive Ï+ and Ïâ electroproduction with 1.6 to 5.7 GeV electrons

[David Ireland]

Dear Peter et al., 

This is a very nice analysis that has clearly been the result of a great deal of effort. Most of the typos I spotted have been highlighted by others, but here are a few additional comments:

- The labelling of each experimental part (Table II, and text) is undoubtedly meaningful within the eg1b run group, but I am not sure is this helps the general reader. Might it be clearer to label them as sequential integers or letters?

- The font sizes in figures 9-24 are probably too small for Phys Rev. It might be worth increasing them before submission.

- On some of the panels there are error bars in the asymmetries that cover more than the entire range. I have a big problem with that. Before you make a measurement what you know with absolute mathematical certainty is that the true value must be in the range [-1,1]. In other words the statistical support is only valid in that range. If you have error bars that are bigger than this range, it implies that you actually now know LESS that you did before the measurement, which is absurd. As these points add nothing to the comparison with the models, I would suggest that they be removed from the plots.

- Could you please add the following to the acknowledgments, to satisfy our grant condition on all co-authored publications:
"United Kingdom's Science and Technology Facilities Council (STFC)"

Best wishes, 

Dave