CLAS Physics Database

Measurement E213M597

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: 2.4 — 3.0 GeV2
W: 1.9 — 1.925 GeV
Ebeam: 5.754 GeV

Measurement data
ψ(p), [deg] dσ/dψ(p), [μb/rad] uncertainty syst. uncert. total uncert.
18.0 0.8005 0.0523 0.1343 0.1442
54.0 0.7788 0.0492 0.1007 0.112
90.0 0.7036 0.0343 0.0878 0.0943
126.0 0.7803 0.0394 0.0963 0.104
162.0 0.8669 0.0539 0.1 0.1136
198.0 0.8062 0.0483 0.0943 0.106
234.0 0.6845 0.0539 0.0868 0.1022
270.0 0.6632 0.0419 0.0841 0.094
306.0 0.7622 0.0405 0.0994 0.1073
342.0 0.7337 0.0424 0.1277 0.1346