CLAS Physics Database

Measurement E213M570

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: 1.825 — 1.85 GeV
Ebeam: 5.754 GeV

Measurement data
ψ(p), [deg] dσ/dψ(p), [μb/rad] uncertainty syst. uncert. total uncert.
18.0 0.7211 0.0493 0.1406 0.149
54.0 0.7675 0.0358 0.1143 0.1198
90.0 0.6913 0.0415 0.0986 0.107
126.0 0.6517 0.0319 0.0931 0.0984
162.0 0.7195 0.037 0.0975 0.1043
198.0 0.6692 0.0329 0.0921 0.0978
234.0 0.6461 0.0306 0.0926 0.0975
270.0 0.7187 0.0364 0.1035 0.1097
306.0 0.7163 0.032 0.1079 0.1126
342.0 0.6732 0.0379 0.1353 0.1405