CLAS Physics Database

Measurement E213M379

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: 2.025 — 2.05 GeV
Ebeam: 5.754 GeV

Measurement data
ψ(π), [deg] dσ/dψ(π), [μb/rad] uncertainty syst. uncert. total uncert.
18.0 0.6622 0.0425 0.1307 0.1374
54.0 0.7652 0.0449 0.1076 0.1166
90.0 0.8086 0.0439 0.112 0.1203
126.0 0.8912 0.0386 0.1166 0.1228
162.0 1.1616 0.0487 0.1377 0.1461
198.0 1.1746 0.0493 0.1392 0.1477
234.0 0.9708 0.0498 0.1238 0.1334
270.0 0.7913 0.0382 0.1096 0.1161
306.0 0.645 0.0455 0.0976 0.1077
342.0 0.6424 0.0382 0.1294 0.1349