[Clascomment] OPT-IN: Tensor Correlations Measured in 3He(e,e′ pp)n

[Mikhail Osipenko]

Dear authors of He3-ppn paper,

the results presented in the paper are very interesting, however these are hard to understand in many places. E.g. Fig.2 would be more significant if corrected for efficiency/acceptance (though probably the correction does not change the picture), interplay between p1, p2 and p_leading could be avoided (using p_slow and p_fast everywhere).

Fig.3 shows the cross section (according to the text), but below I found some confusing discussion about the drope at low momenta related to a cut imposed... Indeed I would expect the cross section rising until zero momentum. Is the observable plotted in Fig.3 really the physical cross section?

Fig.4 is very impressive, but the same question as before come to my mind: is this really the ratio of cross sections? Or one have to assume that some efficiency/acceptance effects are constant in P_tot or cancels in the ratio?

Best Regards,
                Mikhail.