CLAS Physics Database

Measurement E213M633

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(p)
Q2: 2.4 — 3.0 GeV2
W: 2.0 — 2.025 GeV
Ebeam: 5.754 GeV

Measurement data
ψ(p), [deg] dσ/dψ(p), [μb/rad] uncertainty syst. uncert. total uncert.
18.0 0.5751 0.0294 0.1108 0.1146
54.0 0.5205 0.0278 0.084 0.0884
90.0 0.61 0.0356 0.0871 0.0941
126.0 0.6085 0.0284 0.0897 0.0941
162.0 0.6838 0.0398 0.0956 0.1036
198.0 0.7149 0.0453 0.0978 0.1078
234.0 0.6332 0.0432 0.0921 0.1018
270.0 0.6542 0.0451 0.091 0.1015
306.0 0.6787 0.0415 0.0972 0.1057
342.0 0.5834 0.0328 0.1123 0.117