CLAS Physics Database

Measurement E213M552

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: 1.775 — 1.8 GeV
Ebeam: 5.754 GeV

Measurement data
ψ(p), [deg] dσ/dψ(p), [μb/rad] uncertainty syst. uncert. total uncert.
18.0 0.7186 0.0416 0.1239 0.1307
54.0 0.7407 0.0392 0.0992 0.1067
90.0 0.7166 0.0396 0.0911 0.0993
126.0 0.704 0.0328 0.0872 0.0932
162.0 0.803 0.043 0.0956 0.1048
198.0 0.7453 0.0379 0.0892 0.0969
234.0 0.725 0.0428 0.0893 0.099
270.0 0.7199 0.0342 0.0925 0.0986
306.0 0.736 0.0396 0.0996 0.1072
342.0 0.7413 0.0374 0.1269 0.1323