CLAS Physics Database

Measurement E216M421

Experiment: CLAS12 Run Group A
Year: 2018
Spokesperson: Krishna Chandra
Reaction: ep → π+πp
Polarization: none
Quantity: dσ/d(−cos(θ(π)))
Q2: 3.5 — 4.2 GeV2
W: 1.6 — 1.65 GeV

Measurement data
θ(π), [deg] dσ/d(−cos(θ(π))), [μb/rad] uncertainty
9.0 1.25096 0.0809823
27.0 1.08715 0.0451551
45.0 1.10419 0.0698222
63.0 0.868866 0.0371253
81.0 0.683834 0.0317853
99.0 0.607861 0.0293317
117.0 0.551862 0.0216111
135.0 0.567549 0.0222052
153.0 0.723005 0.0587693
171.0 0.766408 0.0591632