[Clascomment] OPT-IN: Measurement of Single and Double Spin Asymmetries in Deep Inelastic Pion Electroproduction with Longitudinally Polarized Target

[Kijun Park]

Hello,
It is great for me to read the article that reports CLAS result in terms of TMD at first time.
Here I have couples of minor questions/comments.

(1) Single Spin Asymmetry(SSA) showed the large systematic uncertainty (8%) for acceptance but Double Spin Asymmetry(DSA)\'s case. Why we consider this systematic error for only SSA ?

(2) It said the SSA for pi+ is roughly consistent with predictions. But that\'s only x>0.25. Do you have any reasonable explanation in low x ?

(3) Your \"possible \" interpretation of pi- data for SSA is because of the interference between rho0p and pi- Delta++, But I guess, your kinematic region is high enough (W2>4GeV2) to separate these. no ?

(4) Fig.4 there is no \"open square\" => should be \"closed square\"

Sincerely yours,
Kijun