CLAS Physics Database

Measurement E213M903

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: 2.025 — 2.05 GeV
Ebeam: 5.754 GeV

Measurement data
ψ(p), [deg] dσ/dψ(p), [μb/rad] uncertainty syst. uncert. total uncert.
18.0 0.3419 0.0287 0.0705 0.0761
54.0 0.3982 0.0384 0.0605 0.0717
90.0 0.4259 0.0291 0.0617 0.0682
126.0 0.4612 0.0251 0.0682 0.0727
162.0 0.4425 0.0213 0.0664 0.0697
198.0 0.414 0.0236 0.064 0.0682
234.0 0.4175 0.0334 0.0641 0.0723
270.0 0.4839 0.0533 0.0675 0.086
306.0 0.3989 0.0266 0.0606 0.0662
342.0 0.4566 0.0363 0.0801 0.0879