CLAS Physics Database

Measurement E213M390

Experiment: E1-6, 2025
Year: 2001

Measurement comment:

The angle ψ is the angle between the plane defined by the three-momenta of the hadron (in parentheses) and the target proton, and the plane defined by the three-momenta of the other two final-state hadrons

Experiment comment:

Experiment year: 2001—2002
Spokespersons: R.W. Gothe, A. Trivedi
Reaction: ep → π+πp
Polarization: none
Quantity: dσ/dψ(p)
Q2: 2.0 — 2.4 GeV2
W: 2.05 — 2.075 GeV
Ebeam: 5.754 GeV

Measurement data
ψ(p), [deg] dσ/dψ(p), [μb/rad] uncertainty syst. uncert. total uncert.
18.0 0.7792 0.0505 0.153 0.1611
54.0 0.7123 0.0344 0.1173 0.1222
90.0 0.7524 0.0411 0.1133 0.1205
126.0 0.7781 0.0384 0.1189 0.125
162.0 0.8177 0.038 0.1194 0.1253
198.0 0.8403 0.0425 0.1215 0.1287
234.0 0.7929 0.0356 0.1186 0.1238
270.0 0.7473 0.0387 0.1123 0.1188
306.0 0.7325 0.0379 0.1171 0.1231
342.0 0.7636 0.0413 0.1507 0.1562