CLAS Physics Database

Measurement E213M741

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: 1.575 — 1.6 GeV
Ebeam: 5.754 GeV

Measurement data
ψ(p), [deg] dσ/dψ(p), [μb/rad] uncertainty syst. uncert. total uncert.
18.0 0.3951 0.0351 0.0489 0.0602
54.0 0.3515 0.0256 0.037 0.045
90.0 0.2852 0.0258 0.0293 0.039
126.0 0.331 0.0235 0.0323 0.0458
162.0 0.3128 0.0216 0.0306 0.0375
198.0 0.3205 0.0202 0.0313 0.0373
234.0 0.2932 0.0286 0.0295 0.0418
270.0 0.3094 0.0264 0.0315 0.0411
306.0 0.3178 0.0284 0.0341 0.0444
342.0 0.4185 0.043 0.0515 0.0671