CLAS Physics Database

Measurement E213M759

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: 1.625 — 1.65 GeV
Ebeam: 5.754 GeV

Measurement data
ψ(p), [deg] dσ/dψ(p), [μb/rad] uncertainty syst. uncert. total uncert.
18.0 0.4642 0.0523 0.0661 0.0843
54.0 0.3658 0.0262 0.0438 0.051
90.0 0.3154 0.0219 0.0361 0.0422
126.0 0.3834 0.0261 0.0406 0.0483
162.0 0.4498 0.029 0.0455 0.0647
198.0 0.3987 0.025 0.0415 0.059
234.0 0.3456 0.0251 0.0375 0.0451
270.0 0.3446 0.0249 0.0393 0.0465
306.0 0.4495 0.0358 0.0515 0.0627
342.0 0.445 0.0438 0.0644 0.0778