CLAS Physics Database

Measurement E213M165

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: 1.425 — 1.45 GeV
Ebeam: 5.754 GeV

Measurement data
ψ(p), [deg] dσ/dψ(p), [μb/rad] uncertainty syst. uncert. total uncert.
18.0 0.5361 0.0291 0.1813 0.1836
54.0 0.549 0.0341 0.143 0.147
90.0 0.4786 0.0295 0.1102 0.1141
126.0 0.5361 0.0326 0.102 0.1071
162.0 0.5587 0.0302 0.1 0.1045
198.0 0.5081 0.0327 0.0946 0.1001
234.0 0.4637 0.0339 0.0962 0.102
270.0 0.5 0.03 0.114 0.1179
306.0 0.4985 0.0359 0.1349 0.1396
342.0 0.5933 0.0307 0.1858 0.1883