CLAS Physics Database

Measurement E213M786

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: 3.0 — 3.5 GeV2
W: 1.7 — 1.725 GeV
Ebeam: 5.754 GeV

Measurement data
ψ(p), [deg] dσ/dψ(p), [μb/rad] uncertainty syst. uncert. total uncert.
18.0 0.6577 0.0446 0.0985 0.1082
54.0 0.6687 0.0517 0.0736 0.09
90.0 0.6879 0.0428 0.0694 0.0815
126.0 0.7179 0.0437 0.0696 0.0822
162.0 0.7325 0.0437 0.0687 0.0972
198.0 0.7568 0.0421 0.071 0.1005
234.0 0.6955 0.0582 0.0682 0.0896
270.0 0.6158 0.0346 0.0647 0.0734
306.0 0.691 0.044 0.0757 0.0876
342.0 0.6506 0.0383 0.0984 0.1056