3pi photo-production with CLAS
The $3π$ system produced in the reaction $γp \to π^{+}π^{+}π^{-} n$ at $4.8-5.4$ GeV is investigated from the E01-017 (g6c) running of CLAS. This energy range allows for the study of excited mesons in the 1-2 GeV mass range, in their decay to $3π$, proceeding through $ρπ$ and $f_2 π$ emissions. At these energies, there is significant overlap in phase space for events with $ρ$ and $f_2$ production, recoiling off an excited baryon, such as the $Δ(1232)$, $N^*(1520)$ and $N^*(1680)$. We show that after few kinematic selections, events of the latter type are suppressed in the final data set, allowing us to perform a PWA on the $3π$ system.
hep-ex↗