CLAS Physics Database

Measurement E213M632

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: 2.4 — 3.0 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 0.5178 0.029 0.0904 0.095
54.0 0.5328 0.029 0.0961 0.1004
90.0 0.6212 0.0449 0.1074 0.1164
126.0 0.6658 0.0286 0.11 0.1136
162.0 0.8093 0.0459 0.1211 0.1295
198.0 0.8299 0.0337 0.1237 0.1282
234.0 0.7276 0.0362 0.1158 0.1213
270.0 0.5981 0.0406 0.1039 0.1116
306.0 0.4733 0.0411 0.0901 0.099
342.0 0.5287 0.0266 0.0916 0.0954