CLAS Physics Database

Measurement E213M434

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: 1.45 — 1.475 GeV
Ebeam: 5.754 GeV

Measurement data
ψ(π+), [deg] dσ/dψ(π+), [μb/rad] uncertainty syst. uncert. total uncert.
18.0 0.3542 0.0256 0.0762 0.1073
54.0 0.389 0.0213 0.0815 0.1151
90.0 0.3984 0.0251 0.0814 0.0851
126.0 0.4391 0.0241 0.087 0.0902
162.0 0.4519 0.0288 0.0883 0.0928
198.0 0.4681 0.0243 0.0908 0.094
234.0 0.4593 0.0256 0.0899 0.0935
270.0 0.3198 0.0247 0.0711 0.0753
306.0 0.3218 0.0186 0.0711 0.106
342.0 0.3986 0.0282 0.0828 0.1209