CLAS Physics Database

Measurement E213M381

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: 2.025 — 2.05 GeV
Ebeam: 5.754 GeV

Measurement data
ψ(p), [deg] dσ/dψ(p), [μb/rad] uncertainty syst. uncert. total uncert.
18.0 0.7665 0.0468 0.1523 0.1593
54.0 0.7605 0.0512 0.1207 0.1312
90.0 0.8007 0.0386 0.1166 0.1228
126.0 0.7805 0.0393 0.1156 0.1221
162.0 0.9114 0.0418 0.125 0.1318
198.0 0.9361 0.0499 0.1266 0.1361
234.0 0.8479 0.0453 0.121 0.1292
270.0 0.78 0.0401 0.1147 0.1215
306.0 0.8611 0.0432 0.1292 0.1362
342.0 0.8016 0.0452 0.155 0.1614