OPT-IN:Differential cross sections for Î(1520) using photoproduction at CLAS

[Marco Ripani]

Dear lead authors,
I read your paper and I have a question:
in Figs. 11 and 12 you write W(K+ pi+ pi-), as if the CM energy was calculated from these three particles. I think this is a misleading notation. How do you actually calculate W and how should that notation be interpreted ? 

Thanks and Best Regards
Marco