CLAS Physics Database

Measurement E213M498

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: 1.625 — 1.65 GeV
Ebeam: 5.754 GeV

Measurement data
ψ(p), [deg] dσ/dψ(p), [μb/rad] uncertainty syst. uncert. total uncert.
18.0 0.6751 0.0488 0.1229 0.1709
54.0 0.5918 0.0382 0.0924 0.1348
90.0 0.5247 0.0302 0.0799 0.0854
126.0 0.4953 0.0262 0.0734 0.0779
162.0 0.4926 0.0358 0.0716 0.0801
198.0 0.5202 0.0237 0.075 0.0787
234.0 0.5142 0.0274 0.0762 0.081
270.0 0.5608 0.0327 0.084 0.0902
306.0 0.5458 0.0308 0.0874 0.1261
342.0 0.6143 0.0401 0.116 0.1599