CLAS Physics Database

Measurement E213M388

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(π)
Q2: 2.0 — 2.4 GeV2
W: 2.05 — 2.075 GeV
Ebeam: 5.754 GeV

Measurement data
ψ(π), [deg] dσ/dψ(π), [μb/rad] uncertainty syst. uncert. total uncert.
18.0 0.6148 0.032 0.1243 0.1283
54.0 0.6568 0.0392 0.0982 0.1057
90.0 0.7215 0.037 0.1055 0.1118
126.0 0.8722 0.0397 0.1145 0.1212
162.0 1.0978 0.0447 0.1334 0.1407
198.0 1.0684 0.0452 0.1322 0.1398
234.0 0.8692 0.0432 0.1157 0.1236
270.0 0.7506 0.0397 0.1075 0.1146
306.0 0.6215 0.0338 0.0949 0.1007
342.0 0.5463 0.0314 0.1187 0.1228