CLAS Physics Database

Measurement E213M595

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: 1.9 — 1.925 GeV
Ebeam: 5.754 GeV

Measurement data
ψ(π), [deg] dσ/dψ(π), [μb/rad] uncertainty syst. uncert. total uncert.
18.0 0.6915 0.0372 0.1214 0.127
54.0 0.6528 0.0368 0.0869 0.0943
90.0 0.6459 0.0327 0.0841 0.0902
126.0 0.7873 0.0525 0.0984 0.1115
162.0 0.9309 0.0409 0.1077 0.1152
198.0 0.9174 0.043 0.1064 0.1148
234.0 0.8328 0.0372 0.1034 0.1099
270.0 0.7592 0.0398 0.0943 0.1024
306.0 0.6559 0.0318 0.087 0.0926
342.0 0.7302 0.0464 0.126 0.1343