CLAS Physics Database

Measurement E213M370

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: 2.0 — 2.025 GeV
Ebeam: 5.754 GeV

Measurement data
ψ(π), [deg] dσ/dψ(π), [μb/rad] uncertainty syst. uncert. total uncert.
18.0 0.6772 0.0473 0.1372 0.1452
54.0 0.7316 0.0456 0.1094 0.1185
90.0 0.8259 0.0403 0.1182 0.1249
126.0 0.963 0.0513 0.1286 0.1384
162.0 1.3332 0.0646 0.1608 0.1732
198.0 1.159 0.0572 0.1455 0.1564
234.0 0.9645 0.0457 0.1309 0.1386
270.0 0.7488 0.0527 0.11 0.122
306.0 0.7828 0.0387 0.1143 0.1207
342.0 0.6708 0.0391 0.1376 0.143