CLAS Physics Database

Measurement E213M453

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: 2.4 — 3.0 GeV2
W: 1.5 — 1.525 GeV
Ebeam: 5.754 GeV

Measurement data
ψ(p), [deg] dσ/dψ(p), [μb/rad] uncertainty syst. uncert. total uncert.
18.0 0.5729 0.0341 0.1112 0.1593
54.0 0.5128 0.0292 0.0835 0.1222
90.0 0.5105 0.0276 0.0781 0.0829
126.0 0.5365 0.0281 0.0792 0.084
162.0 0.6631 0.03 0.0945 0.0992
198.0 0.5821 0.034 0.0847 0.0912
234.0 0.535 0.0335 0.0798 0.0866
270.0 0.5367 0.0307 0.0816 0.0872
306.0 0.5497 0.0301 0.0876 0.1257
342.0 0.5708 0.0422 0.1088 0.1492