[Clascomment] OPT-IN: Induced polarization of Lambda(1116) in kaon electroproduction

[Reinhard Schumacher]

Hello Marianna et al.,
    It is very nice that your paper is ready to publish.  The draft paper convinced me
of your scientific results:
1) There is little Q^2 dependence in the range you measure
2) The recoil polarization of the Lambda is strikingly different than for photoproduction,
especially at back angles.  
As usual, the model-builders have little or no predictive power extending their 
calculations to previously unmeasured observables.  Well, we can hope this paper 
stimulates some new theory work in this area.  

    I don't have any comments on the details of the text.  I'll just complain about
Figure 1, which I find hard to decipher.  I'm not sure what to suggest.  Maybe make the 
parallelogram for the scattering plane appear "horizontal".  The coordinate system 
unit vectors are difficult to read, for example the n, l, t system on the left.  
Maybe repeat the phrase "hadron plane" on the left-side panel.   The decay plane's 
relationship to the hadron plane is not so clear to me.  The angle \theta_p^{RF}  seems
to be drawn incorrectly.  In the figure it looks like the angle between the proton 
vector and the Lambda direction in the boost from the cm frame to the hyperon rest frame.
It should be the angle between the proton and the normal to the hadron plane.  On line
341 you define this angle, but even here you don't state clearly what it is measured 
with respect to.

Regards,
Reinhard