CLAS Physics Database

Measurement E213M867

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: 1.925 — 1.95 GeV
Ebeam: 5.754 GeV

Measurement data
ψ(p), [deg] dσ/dψ(p), [μb/rad] uncertainty syst. uncert. total uncert.
18.0 0.4551 0.032 0.0814 0.0875
54.0 0.4978 0.0355 0.0655 0.0745
90.0 0.4776 0.0433 0.0612 0.075
126.0 0.4596 0.0358 0.0618 0.0881
162.0 0.5292 0.0377 0.0668 0.0944
198.0 0.5137 0.0333 0.0645 0.0918
234.0 0.5183 0.0441 0.0672 0.095
270.0 0.5261 0.0514 0.0658 0.0835
306.0 0.4685 0.0276 0.0629 0.0687
342.0 0.5337 0.0461 0.0878 0.0991