CLAS Physics Database

Measurement E213M732

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: 3.0 — 3.5 GeV2
W: 1.55 — 1.575 GeV
Ebeam: 5.754 GeV

Measurement data
ψ(p), [deg] dσ/dψ(p), [μb/rad] uncertainty syst. uncert. total uncert.
18.0 0.3645 0.0301 0.0811 0.1212
54.0 0.3025 0.0223 0.0605 0.0645
90.0 0.2738 0.0215 0.053 0.0572
126.0 0.3123 0.022 0.058 0.082
162.0 0.3219 0.0217 0.059 0.0839
198.0 0.2889 0.0308 0.0537 0.0767
234.0 0.2705 0.0241 0.0516 0.0733
270.0 0.2988 0.0233 0.0572 0.0618
306.0 0.3323 0.0229 0.0652 0.0691
342.0 0.3186 0.0284 0.0744 0.1155