OPT-IN: Measurement of Beam-Recoil Observables Cx and Cz for K+Λ Photoproduction

Stepan Stepanyan stepanya at jlab.org
Mon Jul 14 14:52:30 EDT 2025


Nice paper, here are few minor comment:
- line 184/185, with the scintillator counters of the …”
- line 260, “tagger vertex time” replace with “tagged electron vertex time”
- lines 269 to 273, accidentals do not rise due to the 2.004 ns, they will be there with any beam bunching. How about “The accidentals, which arise from particles produced in earlier or later beam bunches than the tagged electron, are removed with a +/-1 ns cut placed on this difference (note: beam bunches are separated by 2.004 ns).” 
- line 273, remove the sentence “They overlap …”. Nowhere \beta vs p was discussed or shown, and it is hard to picture for a non-CLAS reader.
- Fig.3 bottom and Fig.4 bottom, are they the same event type?  The \Lambda peak in Fig.3, bottom, looks narrower than in Fig.4 after the kinematic fit
- Fig.11, there are sizable differences between this and the old data around 1.8 to 1.9 GeV for forward angles
- line 618, JB model, the line color (purple) is not indicated in the text


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