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

[Sebastian Kuhn]

Here is a minor list of comments:

line 19: "all spin asymmetries vanish in the absence of interference terms" - do you mean all SINGLE spin asymmetries? Because double spin asymmetries can persist even without interference, I think...
 
line 34ff: Do we need to define all of these variables in terms of electron scattering and pion momentum kinematics? Or at least refer to a paper where they are defined? I see epsilon is actually defined later in an equation (unnumbered), but not Q2 and W.

The Eqs. below 2 and 3 (many unnumbered ones) are a bit confusing but I have to assume they are correct; however, I would define Px etc. with a factor |Pt| and explain that these are the components of the target polarization vector  in the hadronic plane. Similarly, I would multiply the expression for sigma_ez with a factor h or Pb to indicated the dependence on the beam helicity (or at least mention it).

l.45-47: The reader is left dangling - do you account for these effects? More generally, I would say that the equations are modified because of the Fermi motion and the deuteron WF (including D-state) as well as FSI such as charge-exchange reactions, and then state how (or not) you deal with these.

Table I: I think it would be easier to understand if the symbols FOLLOW the numbers, not vice versa.

l. 85: I believe EG1b was in 2000-2001.

l.87ff: I wouldn't capitalize "Parts". Also, 2250 A is 3/4, not 2/3 of max.

l. 99: Ref 22 is now published - PRC92, 055201 (2015). Maybe you could also point out that more detail on the experiment can be found in this and Rob's publication.

Further comments will follow.