CLAS Physics Database

Measurement E213M406

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(π)
Q2: 2.0 — 2.4 GeV2
W: 2.1 — 2.125 GeV
Ebeam: 5.754 GeV

Measurement data
ψ(π), [deg] dσ/dψ(π), [μb/rad] uncertainty syst. uncert. total uncert.
18.0 0.4724 0.0272 0.107 0.1104
54.0 0.4918 0.0347 0.0819 0.089
90.0 0.6489 0.0361 0.0946 0.1012
126.0 0.8045 0.0419 0.1058 0.1138
162.0 1.0229 0.0506 0.1233 0.1333
198.0 0.9363 0.0412 0.1162 0.1233
234.0 0.7826 0.0381 0.1044 0.1112
270.0 0.6057 0.0321 0.0903 0.0958
306.0 0.5712 0.0356 0.0887 0.0956
342.0 0.4889 0.0268 0.109 0.1122